Dormammu

Like Darkseid before him, Dormammu is strongly expected to appear on screen in a live action movie – in his case, in the Marvel Cinematic Universe as a villain of both Doctor Strange and the wider universe – but he isn’t confirmed, so he meets the criteria for this list.

The incredibly powerful member of the Faltine race would look truly epic utilising the CGI available to movie-makers today and you have to assume he will make an appearance in the MCU sooner rather than later.

He is one of the most powerful sorcerers in Marvel comic books and is a huge physical specimen who wears a grand mystical cloak and, most impressively, has an enormous flaming head. He could be made to look absolutely terrifying and could undoubtedly transcend from being introduced as a mere Doctor Strange villain to becoming the new big-bad of the franchise, after the inevitable demise of Thanos in the much-anticipated Avengers: Infinity War movies.