Originally Posted by droidwarrior
They did it for Amazing Spider-Man.
Plus it's not just the movies, it's X-Men as a whole.
Disney/Marvel own 100% merchandise rights to the Amazing Spider-Man in exchange for the partial film rights they had. In other words, these two studios are on good terms and its a shame Fox can't be as well.
The solution is pretty straight forward. They should let go of the Fantastic Four film rights in exchange for the X-Men merchandise rights in order to improve awareness when creating their expanding X-universe.