The Last Son

The Last Son by The Writer With No Name began as a Crossover Fic of Superman and X Men Evolution. It quickly expanded to include various Marvel characters like The Avengers and later expanded again to include various DC characters like the Justice League. Characters that possess multiple continuities are given Adaptation Distillation while others have their backstories altered to integrate the two universes together.

Part 1 is the story of Superman beginning a new life at the Xavier Institute while covertly preventing disasters. Most of the story is Superman's effects on the X-Men and the plot loosely follows X Men Evolution. The Big Bad of this part is Magneto and he attempts to force Superman to lead the mutants to victory over normal humans.

Part 2 expands the character roster considerably and sets up the formation of the Justice League. It also introduces Superman's Love Interest (NOT Lois Lane). The plot diverges considerably from X Men Evolution at the climax of this part. The primary villain here is Doctor Doom but other villains have an impact as well.

Part 3 begins with the world adjusting to the existence of mutants, Superman, and his independent Justice League. Even more characters are brought in here and various factions attempt to bring down Superman. At this point the plot only vaguely resembles X Men Evolution, with the basic events still happening but going Off the Rails in creative ways. Three-quarters through this part the story begins the invasion arc where Shi'ar, Kree, and Skrulls invade Earth simultaneously in a race to seize the Kryptonian technology Superman possesses.

In case you haven't figured it out yet, this fic is MASSIVE. It contains over 1,506,103 words and the author has plans for a part 4. The long read is worth it for the various Crowning Moments of Awesome.

This series provides examples of:

 * Affectionate Nickname: Superman calls Spider-man "Little Red", while Spider-Man calls Superman "Big Blue". Additionally, Logan has one for just about every member of the Xavier institute.
 * Badass Normal: Batman, who takes on the Juggernaut, the Executioner, a Sentinel, the Rhino, and the Kingpin, and even manages to stall  in hand-to-hand combat. Also the Punisher, who manages to escape from Superman (with a gambit that involves grenades, a rocket launcher, and a runaway van) and almost kills the Joker, as well as killing several unnamed inmates of Arkham Asylum.
 * Brought Down to Normal:
 * Code Name: Played doubly straight, as all of the X-Men and Justice Leaguers have call signs in addition to their superhero names; i.e. Dazzler/Nightengale, Superman/Boy Scout, Green Arrow/Robin Hood, etc.
 * Clark Kenting: Present and accounted for, improved with a holowatch.
 * Clone Degeneration: Bizzaro only lasts about a week.
 * Composite Character: Dazzler + = Alison Blaire.
 * Curb Stomp Battle: Happens a lot, but most notably when Superman fights a (demonically empowered) Deacon Frost.
 * Cybernetics Eat Your Soul: John Corban/  encounters this problem after his surgery.
 * Daddys Little Villain: Siryn
 * Deus Exit Machina: A benign example. Superman goes offworld when the X-Men set up a surprise birthday party for him.
 * Eagleland: as the more political-relations with superheroes always center around in the US.
 * Enemy Mine: Various villains including Magneto put their ambitions aside and help the heroes when the alien invasion is about to arrive.
 * Everybody Laughs Ending: Part 1 Chapter 7.
 * Eye Scream: Superman burns out Selene's right eye with his laser vision, prompting this. In fairness, she was about to kill his teammates.
 * Face Heel Turn: Daredevil (and a few other heroes) think that Spider-man has done this during the "Tangled Webs" storyline. He didn't, by the way.
 * Face Palm: Superman sometimes does this when he forgets to bring his holowatch.
 * Good Feels Good: Lance gets this.
 * Heel Face Turn: Superman has this effect on a LOT of people.
 * Heroic BSOD:  Batman almost has one of these when he finds   and he begins flashing back to his own parents' death. Wonder Woman snaps him out of it, though.
 * Leaning On the Fourth Wall: Deadpool when he appears, obviously.
 * Like a Badass Out of Hell: Lobo got kicked out of hell.
 * Loads and Loads of Characters: Inevitable when mixing two comic universes.
 * Kneel Before Zod: Zod gives what is quite possibly the most epic delivery of this line EVER to D'ken,.
 * Murder the Hypotenuse: Siryn tries this against
 * My God What Have I Done: Subverted/played straight - Superman goes through this about once every five chapters for doing what legitimately needed to be done, and needs to be snapped out of his depression by his teammates.
 * Mythology Gag: Many and varied, often with characters substituted where appropriate. Such as Lex Luther related moments being given to other villains like the King Pin.
 * No Holds Barred Beatdown:  gives one to practically every hero in the Last Son 'verse, including, but not limited to: The X-Men, the Avengers, the Justice League, the Fantastic Four, the Brotherhood, Doctor Doom, the Hulk, and Magneto. He beats Spider-Man almost to the point of killing him, tries to strangle Power Girl, and almost incinerates Pyro.
 * No Sell: Superman is explicitly referred to as immune to X-Gene powers.
 * Obstructive Bureaucrat: (Senator Kelly) and "General Ripper" (General Lassetier).
 * Outside Context Villain:
 * Overshadowed By Awesome: Pietro is not happy about being slower than Superman.
 * Put On a Bus: Averted. Evan's bus ticket gets revoked here. Superman convinces him to stay when he's supposed to join the Morlocks.
 * Rocks Fall Everyone Dies:
 * Ship Tease: Early on Clark and Rogue kiss and absolutely nothing happens. They just stay friends after that.
 * Spaceship Girl: Sentrius's AI.
 * The Starscream: Shinobi Shaw to his father, Sebastian Shaw.
 * What the Hell Hero: Superman asks Zod this a LOT.