Grandmaster

The Grandmaster is yet to appear in the Marvel Cinematic Universe, but he will hit the big screen for the first time in 2017’s Thor: Ragnarok, when he will be played by the brilliant Jeff Goldblum.

He is one of the powerful Elders of the Universe and the “brother” of the Collector – a character who has already appeared in the MCU (and on this list), played by Benicio del Toro – and don’t be surprised to see him as the holder of one of the final two Infinity Stones in the movie franchise.

He has possessed one of the Infinity Gems in the comic books and, as the brother of someone who has already expressed a major interest in possessing all six of the Infinity Stones in the MCU, there’s every chance he could have one, too.

Now for a character who has already possessed an Infinity Stone in the MCU.