User blog comment:Jacknapier10/Which characters cannot appear in the Marvel Cinematic Universe?/@comment-5350299-20140428113836/@comment-5164970-20140429125554

I think Magneto stays with Fox, because Fox owns the term "mutant" in general, but with the others... Who knows?

One villain I'm curious about is Rhino. He's a Spider-Man villain, AND he's a Hulk villain, so can both studios use him?