User blog comment:Gemnist/The Benefits of a Marvel Not-Entirely-Cinematic Universe/@comment-11285291-20140125150006/@comment-8284722-20140128080035

That's why there should be a comic crossover. Marvel, obviously, owns all of the comic rights to all the universes. They could easily flesh out a crossover story in comic format. If the thing was in movie format, though, 1) there will be even worse legal issues than the ones over Superman, and 2) the film will have a total X-Men effect, in which there are too many characters with too little screen time.