Here's what I would pitch for the first MCU X-Men movie.
The idea I had for mutants is that they always existed before, but in very limited quantities, and could generally only be activated by an outside source. Xavier, Magneto, Scarlet Witch, Quicksilver and a handful of others are examples of mutants that existed prior to the movie. However, after the events of Avengers: Endgame, with the cosmic and possibly reality-altering effects of said movie, the dormant genes of the public around the world are activated. Thus creating mutants, and paranoia relating to superpowered beings everywhere and thus racism that's not universal, more like a mixed reaction, fitting of the current times, and causes a big political scare.
The present story picks up several years after Endgame, where Charles Xavier opens the Xavier's School of Gifted Youngsters in Westchester, New York. It also serves as the base of operations for the mutant superhero team, the X-Men. It's established the founders are Jean Grey, Iceman, Beast, Cyclops and Angel (to satisfy those who say the founders must be the O5 without the need to actually use them as the stars) and have since expanded to include different members.
The opening starts with the X-Men duking it out with a comics-accurate Juggernaut, who is very much not a mutant here like the source, making a reference to Cyttorak. They subdue and beat him, but one member, Beast, gets injured in the fight and has to recover. This leads to one aspiring student at the academy, Kitty Pryde, to join in his place. The other members think of her as a kid, because she kinda is one, but she aspires to look out for the others over a hatred towards racism.
The main enemies of the movie is Weapon X, led by William Stryker, who send Sentinels to attack and capture mutants for experimentation. The X-Men keep getting in the way, and eventually it becomes an all-out attack as they capture and invade the school (in a manner similar to X2). This causes the remaining members to join together, while also hiding away the remaining students. This team consists of Iceman, Colossus, Storm, Cyclops and Kitty Pryde. With few resources and members, they must overcome the odds to stop Weapon X's plan of exterminating/enslaving mutantkind.
Throughout the movie, Kitty struggles with the use of her powers, and coming to terms with herself as a superhero, while Iceman in particular acts like a bigger brother to her. Very coming-of-age like. It has an overall lighthearted feel, more comic book-like and does a familiar story without the need for the "realism" the Fox series aspired for. In the end, William Stryker is apprehended and made to pay for the crimes he committed against mutants, though possibly setting up his escape and return later.
The end of the movie has Nick Fury approaching the school, saying S.H.I.E.L.D. wishes to ally humans and mutants, and their organizations together, giving the X-Men resources and missions. Xavier says they'll consider it with the implication that he accepts.
Then it closes with the X-Men welcoming new students to the school, saying that the future of Earth depends on them. These include cameo appearances by more recent and obscure characters like Armor, Pixie, Anole, Rockslide, Blindfold and others.
Post-Credits Scene #1: Magneto breaks out of prison with several mutant villains, including Mystique, Pyro, Avalanche, Mastermind and Blob. He vows for mutant supremacy, and refers to the others as the "Brotherhood".
Post-Credits Scene #2: A small alien space pod crash-lands on Earth. When the pod emerges, a certain small purple dragon emerges from the ship. Lockheed.
- The story is similar to X2 in that it borrows from God Loves, Man Kills and yet it takes a different turn by being more comics-influenced and embracing the tropes of the shared universe. It helps the creators like what they're adapting, as opposed to being ashamed of it.
- The movie has a brighter aesthetic compared to the Fox movies, with colorful costumes and humor, and has a coming-of-age like feel with Kitty as the audience surrogate.
- The X-Men are portrayed as actual superheroes rather than people minding their business until trouble finds them. Cyclops in particular is a capable leader and martial artist with stronger eye beams, hopefully that'll redeem him.
- As always, it distills the mythos to fit the narrative, such as having the Sentinels come from Weapon X rather than the government directly and the X-Men allying with S.H.I.E.L.D. in the end.
- The setting is updated. As mentioned above, it's more of a mixed reaction than the universal hatred of old. Instead, it's more due to paranoia and a political scare, with a chunk of the population hating them, but others seeing the X-Men as superheroes and fighting for their rights too.
- If possible, it's best to wait on Wolverine. He hogged enough spotlight in the Fox movies and in the comics, let some others shine as the mythos is far bigger than him.
Main X-Men: Cyclops, Iceman, Colossus, Storm, Kitty Pryde
Other X-Men: Xavier, Beast, Jean Grey, Angel (latter three minor)
Students (minor): Pixie, Rockslide, Armor, Anole, Blindfold (possibly more)
Villains: Weapon X, Stryker, Sentinels, Juggernaut (minor)
Other: Nick Fury (minor), Brotherhood of Mutants (minor), Lockheed (minor)
What do you guys think, would you like this?