Heimdall was the best part of Thor, he's the only character that FELT like a god to me, and i hope he has a much larger role in the next movie.
that being said johnny storm played by a black actor would be awful. i admit i am a stickler for keeping characters as close the the original as possible for these movies, and that i believe that making Johnny black would fuck up continuity way too much unless they make sue black too, but this is the smallest part of my issue with it.
My REAL problem is with johnny storms character himself. he's an asshole, he thinks he's the *ahem* hottest shit there is. now take into account that this would be a big budget film that would be written to appeal to as large an audience as possible. he's going to be made into a black caricature. its going to be Kanye West with fire powers. they are going to point out and poke fun at the fact that now he's a black guy, so what originally just stinks of, at worst, a publicity stunt, or at best a weak attempt at inclusion due the comic industry's lack of black characters that aren't themselves caricatures, will turn out the be more racist. don't believe me that it'd turn out like that? think very hard about how FOX would portray Johnny's and Ben Grimm's bromance. i'd MUCH prefer Reed Richards be portrayed by a black actor, atleast he pretty much cant be written as a Wayans brother.
in conclusion, just make a fucking Heroes For Hire movie already! (please note that this has nothing to do with my above statement, but rather that i reminded myself about the need for it to happen.)