With Fantastic Four and X-Men already screwed up by other studios, and taking Dr Doom and Magneto with them, Marvel is running low on heavy-hitters. The need for greater diversity is a sabotaging factor when dramatising franchises that date from the 1960s as well. Too many of the established and well-regarded characters are straight, white men. Of course, back in the times they were established, the technology to film them properly didn't exist. By the time they could do them justice technically, society had changed. Shame, really. Not about society, but about the tech.