5. Mordo

At the end of 2016’s Doctor Strange, Chiwetel Ejiofor’s Karl Mordo confirmed his turn to the dark side by stealing the magical energies from within Benjamin Bratt’s Jonathan Pangborn, before proclaiming that the problem with the world was that there were “too many sorcerers” in it.

With that in mind, he’d surely be happy to join forces with a bunch of other bad guys if it meant he had help in taking out the Masters of the Mystic Arts – of which there are many (as the final battle of last year’s Avengers: Endgame proved).

Any evil team that forms in the Marvel Cinematic Universe would definitely benefit from having someone with an expertise in magic, in order to counter the powers of the likes of Doctor Strange and the Scarlet Witch – and Mordo would certainly fit the bill in that respect.

The aforementioned ending to Doctor Strange certainly suggested that Mordo was poised to make a return to the franchise. Having him do that as part of a versatile team of villains would be pretty spectacular.

He should be one of the first people anyone looking to form a villainous team goes looking for.