That is kinda insane, Source material exists for a reason. Lotor, Harry Potter, Twilight, Hunger Games, They all followed the general source material. If you don't respect the source Material don't do the freaking movie. Adapting content for TV or Movie is fine, Comics is told over multiple issues(and years) and often isn't a clean story to tell. So yes writers have to condense stuff and change stuff when it is time to make a movie. But if you don't have to make a change to the source material you don't because the thing is being a made for a reason. X-men was made earlier and not Eternals or Inhumans, not Harbringers, Not Wildcats, Not Youngblood, not Cyberforce for a reason. If you just need a superhero universe that you can bend and change anything could be used. The X-men is good stories not a concept box. X-men is popular because of good stories and good characters in those stories. And has a fan base of people who almost instantly make a movie a success when you do it right to the source material. Fans go see movies multiple times, buy toys and merch. Those other universes and concepts I mention don't have that is why Hollywood hasn't made them into a movie.