Originally Posted by
Beaddle
The justification was important and had more good than bad, the justification is also about the x-men universe tone. The tone of X-Men was usually different from the rest of marvel. it was a lot easier to buy them in their own universe than a crossover universe. This carries also to films. the last two main xmen movies took place in a desolate dystopian futures Logan and DOFP, which has everything to do with tone and themes. MCU don't do dystopian futures. There was a lot of justification to support them not joining the mcu, too much important lore would have to changed for them to join the MCU. its better to keep xmen self contained in movies , cartoon and comics, it's a proof in theory now because they actually have the evidence to proof it, even shows like Legion never pretended to be part of the movie universe.
I did notice about 3 years ago when I rewatched X-Men and Spiderman TAS back to back as a much older adult. I noticed Spiderman had far more main guest appearances. The Punisher, Daredevil, Dr Strange, Nick Fury on his show. X-Men had barely any little guest appearance. I only remember dr strange, black panther and thor making cameos with barely any lines but the xmen tas universe was far more self contained than spiderman, you would hardly know it takes place in a larger universe of other heroes.
I dislike what crossovers have done now because of things like the MCU. It's a shallow concept in the long haul and it takes more away from IP like Spiderman and X-men than it gives to them.