X-Men are noticeably missing in the Marvel Cinematic Universe (MCU), and one theory suggests that Charles Xavier, aka Professor X, has something to do with it.
X-Men and Avengers exist in the same universe in Marvel Comics. However, the mutants are missing in the Marvel Cinematic Universe (MCU), which features the Avengers like Captain America, Iron Man, and Thor. One possible reason was that X-Men and Avengers used to exist in separate film franchises owned by different studios, but one fan theory suggests a reasonable but «horrific» explanation.
Reddit user Acceptable Quail 357 suggested Professor X hid the mutants using his telepathic powers. X-Men was considered a superhero team before mutants became rampant and terrible things happened. The user admitted he wasn't sold on the idea because the arc seemingly suggested that Professor X «abandoned the dream.» The user wondered what made the powerful mutant give up and keep his kind hidden. Additionally, considering their potential, powerful mutants like Magneto are unlikely to agree to be hidden.
The post included a document mentioning mutant extinction events. There was reportedly an increased number of mutant births, which opened the door for human-on-mutant crimes to be enacted. It also included names who reportedly committed major mutant crimes, including Steven Lang, Mister Clean, Graydon Creed, Cameron Hodge, Wanda Maximoff, and Bolivar Trask. Elizabeth Olsen's Wanda Maximoff, a.k.a. Scarlet Witch, was featured in multiple Avengers movies. She also scored her spinoff series, WandaVision, which streams on Disney Plus.
The theory opened doors to more speculations about the X-Men's fate in the MCU. While many didn't like the fan theory, it was somehow a good arc to explain the absence of the mutants in MCU, which is difficult to bring up. In the comics, X-Men and Avengers frequently come into contact and are sometimes allied or in conflict. There was even a storyline titled «AvX,» where the two groups were pitted
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