I'm very curious to see how Marvel would approach an Inhumans movie.
My guess is they would somewhat stand in for X-Men, being feared/reviled by humanity but ending up saving humanity somehow. I suppose the film could be confined to Attilan but if they are going for an x-men vibe I think some interaction with humanity would be necessary.
THe Inhumans are a pretty sombre bunch, I guess with the exception of Crystal. Will the character's personalities change to make them have more of a sense of humor?
Will the Inhuman's world be established as having existed for a long time or will they gain their powers during the movie?
Does the whole royal family make the cut? Blackbolt, Medusa, Gorgon, Triton, Karnak, Maximus, Crystal, Lockjaw? Will Quicksilver show up? Will Blackbolt have the same power levels as the comic or will he be downgraded a bit so that Vin Diesel's voice gets used at least a little?
have to second the question about how Fox doesn't have the rights to the Inhumans as part of FF.
Lots of questions, fun to consider though.