Wicked (novel)/WMG

Trism is Ozma, the true ruler of Oz, in disguise or under a spell
This Gender Bender plot was in the original version with Tip, so why not here with Trism?
 * This time, either Tip/Trism isn't going to have such an easy time becoming a girl, or Liir is really oblivious (like, M. Butterfly oblivious).
 * C'mon! This HAS to be addressed in the third book, and someone has to have read it, right?
 * Not addressed in the third book. Liir, Trism, and Candle have all vanished without a trace (at least, as far as the protagonists of A Lion Among Men know.)
 * Haven't read the third book, but in the second book, Liir briefly observed the actual Tip(/once-and-future-Ozma) being scolded by the witch whose name I have forgotten how to spell. Mombie? Mumbie? It was a blink-and-you'll-miss-it appearance.
 * I think it's Mombie. I wonder how many heads she had by then? Anyway, if Tip/Ozma already exists in Wicked!Oz seems that the author thisclose to a tragic ending for Liir and Kaworu Trism, the only character - and coincidentally his only male love interest - whom Liir felt he had an emotional connection with. That sort of development seems at odds with the author's real life loving relationship with his partner/husband and their three kids.
 * Mombi didn't have multiple heads in original Oz canon, that was Princess Langwidere. Mombi was an elderly witch.
 * Jossed in Book Four:

Liir, being an Expy for Shinji Ikari, will try to use the Deadly Desert or nearest equivalent to cause an irritating version of Instrumentality.
Sorry, Jossed in Part I of the book. The desert being deadly is just propaganda to keep raiders from trying to get to Oz.
 * Or nearest equivalent. It'll happen even if Liir has to build that equivalent personally.
 * Okay, sandworms then (just kidding). Still, the sight of the Wheelers crumbling into sand sculptures is quite evocative...

Eh, what the hell: All Deconstructor Fleet universes lead to/away from Wicked
If Elphaba returns she'll crush/strangle Trism to death if he betrays Liir in a fit of Mama Bearishness. Dorothy, Candle, etc. will make Heroic Sacrifices (or maybe just stupid ones) that'll help cause the downfall of Oz due to Elphaba, Fiyero, and Galinda's Gambit Pileup. Oz eventually becomes the Watchmen universe, which creates Dr. Manhattan who creates the NGE universe, which creates Rei who becomes Instrumentality which becomes the "original" Oz(s) inside her while she creates another, other, other Earth, which sends colonies to 12 planets, etc. etc. until all this comes down to us, who create all these stories again.

This book and this musical are in an alternate world from the Wizard of Oz books and The Wizard of Oz movie
The book and musical have stuff from both the Wizard of Oz movie and the original book series. Also, Glinda has blonde hair instead of red.
 * ...yeah, that's not a WMG, that's a fact.

The Fourth book's going to be about the Tin Man
Because we've seen all the other popular characters. Also, Elphaba will return because the author has dropped enough hints!!
 * Now now, Maguire may be a tool, but he's not that big of one. The cycle was originally four books, but the last two got combined into one. Inverse of Trilogy Creep, anyone? If he decides to be a huge tool, I'd be very upset. And even more so if he becomes the biggest and resurrects Elphaba. She's dead! Good news! ... or are you just a troll. HCO? You trolling again?
 * Dunno where you got your sources on that whole merging thing, but it's wrong. Third book brings Nor back into the picture and kills off Yackle. 4th book will presumably be the resolution, rumor has it Glinda gets the starring role.
 * Elphaba's return is pretty much Jossed. In the third book, when they  they specifically state that it's only Elphaba's sign: That Elphaba's time is done and that she is gone for good.
 * To be fair,  That could easily refer to Elphaba.
 * Actually,
 * Maguire already alluded to the fact that the fourth book will be about Glinda.

Green Elixir is absinthe.
The Wizard brought a whole case with him from Nebraska, and only hands it out when he feels like it. It has an intoxicating effect on Oz locals, so Melena was able to be seduced, and IIRC he gave it to Glinda in the musical to take away the pain.
 * Green Elixir is a roofie. Because the land of Oz is in another planet/dimension/universe, it's harmless to humans (besides the roofie effects) but causes congenital defects in Ozians.
 * I was always under the impression that the Green Elixir was an Earth patent medicine. Same argument as the above, but it explains why the Wiz was carrying it on him in the first place.
 * Alternatively, it could also be Coca-Cola. When Coke was first created, it was green in color and contained cocaine.
 * Cocaine would keep you awake, the exact opposite of what the elixir was meant to do.

In the novel, Glinda knowingly revealed Elphaba's Emerald City hideout to the government.
It's implied that she suspects Elphaba is in the Emerald City ("If you see her, tell her I miss her still.") Sarima's sisters suspect that Glinda had a hand in Fiyero's death; maybe they're right after all.
 * Jossed in the third novel.

Elphaba's granddaughter will be deformed.

 * The rain would've melted her away like her grandma, but Liir brought her inside quickly enough so she was only disfigured.

In this alternate Oz, Animals are descended from Earth animals.
According to The Land of Oz, all animals can talk once they enter Oz. Here, though, it's very clear some Animals talk, and some animals can't. It's possible that, in time immemorial, some Earth beasts got stranded in Oz as Dorothy did, and gained the power of speech, giving rise to the many breeds of Animal.