Vin Diesel has made no secret about his desire to take on a larger role in the Marvel Cinematic Universe, and after the overwhelmingly positive response to his take on Groot, you have to imagine that it could happen. One role in particular which the Fast & Furious star seems particularly well suited for is Black Bolt, so could that be why he continues to seemingly tease some sort of involvement with Inhumans?Another theory of course is that Groot is an Inhuman, and the actor is simply playing around with that bit of inside knowledge about the origins of the character he voiced in Guardians of the Galaxy. What do YOU think? Share your thoughts and theories below...