Originally Posted by X-Maniac
I would rather they didn't clutter up an X-Men space movie with the Fantastic Four. That would be too much, and too many characters, on top of Starjammers and/or Imperial Guard. It would muddy the water too much.
Some slight crossover would be fine (like Reed Richards talks on a screen to the X-Men about the space mission, or they mention he designed the rocket or something). But the whole F4 appearing in the same movie might feel like too much.
If the X-Men and the Fantastic Four do a team-up movie, they don't exactly have to face the StarJammers or Imperial Guard especially if they are in outer space. They could do what the Avengers did, face 1 villain with an army of aliens.