Street Fighter X Tekken/WMG

This game has fatalities
Dan was killed by Kazuya.
 * Kazuya: The beatdown from the trailer except more obviously lethal.
 * Ryu: Electrifies the internal organs.
 * Kuma: Mauls the foe.
 * It's highly unlikely that this game is going the Mortal Kombat route just because one character ended up dead because the dev team didn't want him in the game.
 * Recently, Street Fighter producer Yoshinori Ono said a collaboration with Mortal Kombat was "very unlikely" because it would involve the SF cast getting killed, which doesn't match the series' feel at all. So I think that proves Street Fighter will never involve player-inflicted death.
 * Also, both Street Fighter (Rose, Gen, Gouken and possibly Charlie Nash) and Tekken (Kazuya, Jun, Baek, Bruce, Wang, Lee, Armor King (in a way)) have had characters die only to come back in later games.
 * Of the above, the only character who is officially dead is Armor King I (you're also missing King I and Kuma I). Kazuya could maybe count as his return in Tekken 4 was due to being Saved by the Fans while Gouken was retconned from dead to Only Mostly Dead and in a Convenient Coma, but the fates of Rose, Gen, Baek, Bruce, Wang, and Lee were left ambiguously open (with later games showing they were just fine), whereas Charlie and Jun are officially missing. Your argument (was that an argument or just a statement?) doesn't quite stand.

In Tekken x Street Fighter / Street Fighter x Tekken, King and Zangief will have their own tag-team ultra.
Lets see. King using the Muscle Buster? Check. Zangief's new Siberian Blizzard? Check. King doing a Kinnikuman tribute in his Tekken 5 ending? Check. If they do a tag finisher and it's not Muscle Docking, I will be SO PISSED OFF.
 * Jossed. King is teamed-up with Marduk.
 * Incorrect. Zangief and Kuma will have their own tag-team ultra, beacuse...

Kuma is one of Zangief's sparring partners.
Zangief supposedly trained by fighting bears, and Kuma is (logically) the most skilled bear at fighting, so...
 * Jossed. Kuma is teamed-up with Heihachi.

Sakura, Karin, and Juri will be in SFxT.
Lili and Asuka have been leaked in the E3 trailer (Lili appears immediately when the trailer starts, about five seconds in; if you're quick, you can catch a glimpse of her boots) and Asuka appears as the cloaked figure Chun-Li confronts during The Stinger. As such, it only makes sense that their counterparts from SF make the cut as well. It doesn't hurt that they're quite popular and since they weren't featured in MvC3, they have a good chance of making it here (especially since the Power Creep, Power Seep element won't be as noticeable since SF and Tekken are more evenly matched).

As for Juri, Hwoarang's already confirmed for the game; you should see what I'm getting at here.
 * Unfortunately, they've already said that Juri is very unlikely.
 * The latest teasers seem to indicate otherwise.
 * Jossed. Karin has been deconfirmed by Lupinko, the guy who accurately predicted the cast of Marvel vs Capcom 3, Ultimate Marvel vs Capcom 3, Mortal Kombat 9 and Super Street Fighter 4.
 * Sakura and Juri are definitely in, with Sakura being one of six DLC characters for PlayStation 3 but included for PS Vita, but Karin is not.
 * Word of God stated that Karin has copyright issues as well. Think Strider Hiryu in MVC3, similar problem.

Dan Hibiki's death will have a major impact on the plot.
Let's face it, Kazuya's first big action in this game's history is to flat-out murder Dan in cold blood and drops the corpse on Ryu's doorstep. Seriously, you don't kill off one of the most iconic characters in the Street Fighter franchise in the goddamn teaser trailer of a long-awaited crossover between two big franchises without that death have some kind of impact on the game's story line.
 * And now it seems he is having some impact on the plot...as the guy in charge of the game's tutorial. Furthermore, recent information from Word of God and this story promo hint that Dan's spirit is trapped inside Pandora.

Dan Hibiki will return to life and become the True Final Boss
Either resurrected and using Satsui no Hadou or becoming Cyber Dan thanks to Dr. Bosconovitch. And he will be the hardest boss in fighting game history.
 * If the recent story promo is anything to go by, it actually hints that Dan's finally tapped into the Satsui no Hadou...for about 3 seconds and then gets destroyed again by (supposedly) an off-screen Kazuya.
 * Except that dark figure with the Red Eye is clearly Kazuya about knock Dan into the wall.

The Tekken cast is invading the Street Fighter universe, possibly to acquire the Satsui no Hado
Based on the trailers, the Tekken cast are being shown in a more villainous role (even for the heroic characters from the franchise) for the game. So far, Kazuya has brutally murdered Dan Hibiki as well as violently attacked Ryu and Ken with support from Nina and possibly support from the Tekken Force and NANCY-MI847J (or whatever the robot that appeared near Nina and Ken is called). It should be noted that both Ryu and Ken are among the most likely (after Akuma, natch) to tap into the full power of the Satsui no Hado, making them prime targets in Kazuya's eyes. In addition, the stages and atmosphere of the game have implied that most of the Street Fighter cast have been on the defensive from the more aggressive Tekken cast invading their universe. Furthermore, when Chun-Li confronts Asuka in The Stinger of the E3 trailer, the situation seems as if Chun-Li is trying to get some information out of Asuka as to what is going on.
 * This seems plausible for someone like Kazuya, Heihachi, and maybe Jin, but I'm not sure if that would be motivating the other characters as well. If the timeline of the crossover is somehow following the current Tekken story (which is likely given the Kaz uses a Tekken Force member to call for Jin), then Nina wouldn't even be helping Kazuya because she's serving as Jin's Dragon in the Mishima Zaibatsu. Not to mention that there are only a handful of characters in the verse that are spiritually aware/have understanding of the supernatural (the Mishima and Kazama families, Julia and Michelle, Zafina, probably Yoshimitsu and the Manji Party). I'm willing to bet that guys like King, Marduk, and Hwoarang don't even know about the Satsui no Hadou, and the more benevolent fighters (i.e. Julia) wouldn't even want to get involved with such destructive power in the first place.
 * Jossed with the actual storyline, involving Pandora and almost the entire cast (both SF and T) going to Antarctica to see what's going on with the artifact. (Poison and Hugo are there just to show for the media, Cole wants to destroy/absorb Pandora and the two cat things are there For the Lulz.)

Steve Fox, Dudley & Balrog will ALL be in the game
Because they're all boxers, and people would complain if they included no matter who was left out. Even if it was all three.
 * Steve's in the E3 trailer (if you look at the moving splash of water to the left of the still of Hwoarang, you can briefly make out his silhouette), so he's definitely in. If any of the three were to get shafted, it'd probably be Balrog. Ono did say that they were aiming for fighters who missed the cut from IV and Dudley is much more popular among fans than Balrog is.
 * Or maybe not, seeing as Balrog was just recently teased.
 * Dudley has been teased by Lupinko, the guy who accurately predicted the cast of Marvel vs Capcom 3, Ultimate Marvel vs Capcom 3, Mortal Kombat 9 and Super Street Fighter 4.
 * And Dudley has been confirmed as the 1 out of 6 characters who will be included with the Vita release but will be DLC for consoles.

This game will feature two original fighters
And they will both resemble Reiji and Xiaomu somehow.

Kazuya didn't kill Dan
Keep in mind they said "Dan is not alive in the timeline of SFxT". They did not say "Kazuya killed Dan". Dan may be dead, but it might not be at Kazuya's hands. Hell, he might actually be playable and merely die in a canonical story mode - it worked for Mortal Kombat 9.
 * Jossed by Word of God. Ono noted in an interview that Dan is not playable on account of being killed by a Tekken character in a cinematic- that character being Kazuya.

Cody & Guy are in the game
Since they weren't in Marvel vs. Capcom 3 & it would make no sense why Poison got into this game over the two of them considering she's never actually appeared in a Street Fighter game outside of a cameo. Plus they already have the character models & animations from SSFIV & it would make no sense to get the voice actors in just to record one line a piece at the end of the SDCC trailer.
 * Additionally, one of the voice actors slipped up during Comic-Con and stated that Michael T. Coleman (the VA of Cody from SSFIV)... was voicing Cody. He immediately stopped himself and went on to a different subject. Hmm...
 * Cody was voiced. In the Comic-Con trailer. It is still unknown if he's actually in the game.
 * Yeah, I know that, but they were talking in the context of being in the booth, recording lines for actual gameplay, not the one or two lines Cody has in the trailer.
 * Both have been confirmed as DLC characters for the console versions and included in the Vita version.

C.Viper will be in the game
Tekken has a family theme, C. Viper is a mom... and part of the CIA. And who doesn't want to see her go all Mama Bear because the Tekken side attacked her kid?
 * Then again, C. Viper had her fun in both Marvel vs. Capcom 3 and Ultimate Marvel vs. Capcom 3. Maybe let some of the other new SFIV characters shine?
 * Jossed. All characters have been revealed for S Fx T, and unless there's more character DLC planned, chances are she won't be present.

Heihachi will be in the game
It has already been confirmed that there are "canon" teams in addition to whatever the player wishes to set up, that have been revealed in halves in the various trailers so far (first Yoshimitsu, then Raven, and so on). Kuma is one half of such a team, now that he's been confirmed, and the most logical person to pair him up with (looking at the Tekken story) is Heihachi. This is not a precise mechanism (Hwoarang would probably team up with Baek, canonically speaking, yet Baek is not in the game), but seems to be logical enough that Heihachi is in with a chance.
 * Alternatively, a billboard on a stage shows Kuma and Roger Jr. being paired up, which could be worth considering, especially seeing how Ono said that animals were a 'big part' of Tekken.
 * Heihachi has been confirmed.

Rolento and Sodom are in the game
Ono has said that Rolento was one of the characters that he wanted to add to Street Fighter IV, and signs also say that 'Sodom is behind you.' As two leaders of the Mad Gear Gang, as well as the two that transitioned over to the Street Fighter Alpha series, they would be unique roster additions with distinctive playstyles.
 * Rolento has been confirmed.
 * But he's canonically paired with Ibuki. No hints of Sodom yet (besides a stage cameo alongside several other Mad Gear Gang members), or who he'd be accompanying.

Lars and Alisa are going to be in the game
Both their fighting styles are somewhat Street Fighter-ish to begin with already. Lars has his dashes and electric attacks. Alisa can fly, use chainsaws, launch her arms like missiles, blow her head up, etc.
 * Lars and Alisa have been confirmed as 2 of 6 Tekken characters who will included in the Vita release of S Fx T, but as DLC for consoles.

The final boss would be...
Capcom would have the liberty to choose whether to re-use a boss from Street Fighter or Tekken for the game, albeit powered with the Pandora energy (since that seems to be the main focus story-wise for the game). The best bet would be to use either:
 * Gill: Gill (and the Illuminati, his organization for that matter) originates from space. Considering the fact that the Pandora cube came from outer space, one could imply that it was an artifact that originated from the group. Plus, Street Fighter III regained its former popularity coming from the PlayStation 3/360 online edition, so Capcom can capitalize on the opportunity to put him as final boss. Here's to the omission of his goddamned Seraphic Wing super art.
 * Unknown: Looking at the previous bosses in the Tekken series, it seems that the final bosses of the main series get more popularity in the other games (i.e. Jinpachi and True Ogre get Demoted to Extra in Tag Tournament 2). There could be a Shocking Swerve like having the Pandora cube being related to Unknown and her mysterious energy, or something like that. Plus, she could function as a Mirror Boss, to make things interesting.
 * It's implied that Akuma and/or Ogre are the final bosses of S Fx T.

Nathan Drake should be Cole's partner
The Badass Normal Nathan Drake fought against zombies and survived so much shit that would normally kill a regular dude, so who's stopping him from kicking the asses of Bob or Hugo alongside fellow Playstation hero Cole Macgrath? Gameplay-wise, Nathan could use a combination of hand-to-hand combat alongside his various firearms to make for some kick-ass attacks like Chris Redfield or Solid Snake.
 * I'm going to have to disagree with you and say that I wholly hope this doesn't happen. The game's already has three Guest Fighters, all of them Sony-exclusives, and all of them souring the fanbase. The last two, in fact, was Ono pulling one over the fanbase by taking a poll for characters fans wanted to see in the game (in which Dan was soundly beating the rest of the competition) and then crossing out Dan's name to replace it with Toro and Kuro at the very last second. I don't think that another guest who detracts from the whole Street Fighter vs. Tekken theme of the game (and is again exclusive to Sony, which is bound to not go over well with 360 fanboys) is going to be a good idea.
 * You do have a point though. So how the hell will Microsoft manage to bounce back for the 360 version, considering that the Cole, Kuro and Toro are PlayStation 3-exclusives? I don't really see somebody from Halo or Gears of War making into the cut.
 * Banjo and Kazooie, or Blinx.
 * All characters appear to have been confirmed, so no partner for Cole.

Jin sent Nina to spy on Kazuya.
In SFxT, if the various trailers and official website are any indication, Kazuya/Nina is one of the canonical tag teams for the story. However, the profiles for the story say that Nina just mysteriously came out of nowhere to offer her services to Kazuya. The story shows that the Mishima Zaibatsu (and Shadaloo, but that's inconsequential to this WMG) is connected to some of the plot. The fact that a) Kazuya's bio notes that he's working with G Corportation (while plotting behind the scenes to retake the Zaibatsu), b) neither Heihachi nor Kuma are in control of the Zaibatsu, and c) one of the trailers has Kazuya send a message to Jin through one of the Tekken Force members makes it a safe bet to say that this timeline follows the events of Tekken 5 and 6, where Jin won leadership of the Mishima Zaibatsu and made Nina his Dragon. It's yet to be seen if Jin will be directly involved here (and I'm sure that he will be), but he knows that his father is the one person he most definitely needs to keep his eye on. Seeing as 6 shows that Jin puts a good deal of trust, faith, and respect in Nina (and vice versa), he'd figure that Ms. Williams is the only woman capable of getting the job done. Kaz may or may not know himself, but this being Kazuya, he probably doesn't feel threatened enough to worry about it in the first place.
 * Most likely confirmed in their ending,

Cole's inclusion in S Fx T (story-line wise) Note: spoilers for Video Game/inFamous 2 follow
It's a given that this Cole is from inFamous 2, since he has the new look, the Amp, and the Ionic Powers. Now, it's a little weird to see Cole retain his neutral look, since by the end of inFamous 2, he's either So there can be several (obviously non-canon reasons for his being present in S Fx T:
 * 1. Cole  Hence his inclusion in S Fx T. It would be easier to branch his appearance off the Hero ending as opposed to the Infamous ending, since  and besides, Cole looks more of the hero-type than his Infamous version. (Troper's note: It wouldn't hurt to see  Cole for his Pandora mode)
 * 2. Instead of choosing to use the RFI or helping the Beast in inFamous 2's ending, Cole Takes a Third Option. What that third option is, I don't know. Capcom does something out of it and puts Cole in.
 * 3. For the Lulz. Arguably the main reason as to why Guest Fighters exist. He doesn't really need to have a story behind his appearance.

Dan will be brought back in the next crossover, Street Fighter Vs. Mortal Kombat
Many characters in Mortal Kombat canonically come back to life all of the time. Heck, Scorpion, Noob Saibot, and Sindel are all some form of undead monster, and the ending to the last game suggested that. Quan Chi would try to resurrect a new Hellspawn like Scorpion, only to accidentally summon Dan instead of the mighty warrior he intended to, leading to Dan creating the bridge between the worlds. Sometime during the story, he'll be un-Hellspawned and return to his usual self for future Street Fighter games, with his death and resurrection never being mentioned again.
 * For one, Capcom keeps shooting down collaborations with MK because they don't like the idea of Scorpion punching the head off of Ryu (see the first WMG on this page); it doesn't look like their stance on that is going to change any time soon. Two, crossovers (even the ones that exist in the same series) rarely affect each other in terms of plot, so even if there was a MK vs. SF, I doubt the "plot" of SFxT would factor into anything. Three, SFxT (and the rest of the Vs. series) has no influence on the actual universes the characters hail from; Dan is dead here, but that won't affect his status in the actual SF timeline. And just to nitpick,

Leo will appear
Because she is hot
 * Jossed. Unless more character DLC is planned, chances are Leo isn't in.

Makoto will appear
Same reason
 * Jossed. Unless more DLC will be made, chances are Makoto won't be seen.

Dan isn't dead, he's in the hospital
That would explain why he's running the tutorial mode despite being dead.
 * Jossed. He's actually dead, but it's heavily implied that his spirit is being kept alive inside of Pandora. Furthermore,

Dan is dead, but he's running the tutorial because he's become more powerful than you could imagine
In other words, Dan is a Jedi. Search your feelings, you know this to be true.

Pacman and Mega Man will be included.
Look at this photo. That is all.
 * Confirmed, though both are only available on PlayStation systems as DLC which is released a week after the game is, and not as you know them.

Dictator and Juri's alliance is an Enemy Mine.
In Street Fighter IV, Juri is Seth's Dragon, and S.I.N. is clearly opposed to Dictator. Juri also specifically states she doesn't take orders from Bison in the 16/01 cinematic trailer. Why else would they be teaming up?
 * Confirmed.

There will be a Guest Fighter or more in the Xbox 360 version.
Last time I checked, neither Sony nor Microsoft have any exclusive rights to either Mega Man or Pac-Man, so they might be included in the final product (despite the news that the 360 will have no guest fighters.) Besides, Master Chief and Marcus Fenix could still make it as DLC.
 * Jossed, NO guest characters will show up on the 360 version.
 * I Joss your Jossed. Pac Man and Mega Man are on the 360.

The Mega Man in-game is an actor.
An actor for a Mega Man film that went through an absolutely severe amount of changes.
 * Jossed, Mega Man is implied to be the actual Mega Man judging from his intro.

Akuma's tag partner
Akuma. The big, scary, incredibly powerful raging demon will be partnered with
 * Akuma doesn't actually have an official partner, but some consider his partner Ogre.

The Beast from Kessler's timeline inFamous is actually Cole tripping on Pandora.
Look at the Beast from inFamous 1. Look at Pandora Cole.

Lili's and Asuka's rival cutscene wasn't suppose to take place at the half pipe stage
Because it just seems out there that Chun Li would say that a public skate park closed off to civilians
 * I dunno, possibly the restricted area is the part we can't see, behind the camera...

Lili is Anna Williams' daughter
Check out her winquote against Nina. She refers to Nina as 'auntie'. www.youtube.com/watch?v=y7KJ1mCNmRk (at around 5:30)

In Tekken x Street Fighter, some of the Street Fighters will speak their native language
While most of the Tekken cast speaks Japanese or English, there are several characters who speak other languages, such as Wang Jinrei speaking Chinese, and Baek speaking Korean. And in Tekken Tag 2, characters such as Lili and Leo will also be speaking their home languages of French and German respectively. The Street Fighter norm for its series has always been Japanese or English voices, and this even showed with Hwoarang who didn't speak Korean, and only spoke English or Japanese in Street Fighter x Tekken. Can we expect the same in the upcoming Tekken x Street Fighter, and see some things, for example, Zangief speaking Russian, Dhalsim speaking Malayalam, Vega speaking Spanish, or Juri speaking Korean?