In 15 years of the MCU existing, I know that I have seen and read hundreds of different fan theories. There were some very popular ones, like Heimdall/the bofrost being tied to the Soul Stone, and some eccentric ones that only one guy insisted on but no one else believed.
What are your fan theory highlights?
That would be fun. He could also be a critical character in an Messiah Complex-type introduction to the MCU.
Like imagine if M-Day happened, except Wanda was far more effective at rewriting Mutants out of existence entirely. Her powers, along with her brothers, are returned to the timeline by the Stones, but she has no memory of what she did or why.
Fast forward to the present, when Hope is born in the current multiversal MCU with the power to re-power mutants, and is immediately attacked by the Purifiers who kill her mother Then comes the time traveling X-Force team come to protect her from Bishop and Nimrod. Baby Hope is being toted around by Cable, Wolverine, Deadpool, Domino, Colossus, maybe an adult Negasonic and Yukio, bumping into random mutants and unlocking their latent powers. But also, they keep getting bailed out of near-death experiences by an extra in the background of the scene. Nobody really notices it until they run into a middle aged Charles Xavier, and he can read ForgetMeNot’s mind, except he’s Xabi Spalding, Hope’s biological dad who nobody ever bothered to look for or even questioned if he was alive. He’s been following them around from the beginning, having watched his wife give birth and his powers unlocked the moment he held his daughter. He’s exasperated because he has explained this several times already.
Xabi sacrifices himself after he agrees to let Cable take Hope to the future to protect her, and we realize that an adult Hope had also been in the background, mimicking her dad’s powers (among others) and saving his ass. They reunite moments before he is killed. By Stryfe. Wade loses his shit at the number of twists.
