Mister Sinister

Mister Sinister is a character strongly associated with Apocalypse in the comic books – Apocalypse being the major upcoming villain in the X-Men movie franchise – so it makes sense that he might appear on screen too and that would be no bad thing. He has also been shown to have manipulated Cyclops’ whole life for his own advantage.

Sinister – AKA Nathaniel Essex – has been an accomplice of Apocalypse, a foe of Apocalypse, has impersonated Apocalypse and has even had a pact with Apocalypse to make himself immortal, so he could easily be introduced to the movie universe.

Essex – who was born a human and became a scientist before being artificially augmented in various ways – has already been confirmed to exist in the X-Men movie universe, as his name was seen on screen in X2 when Mystique hacked into Lady Deathstrike’s computer.

He possesses a genius intellect and a huge variety of powers, including superhuman strength and durability, telepathy, a regenerative healing factor and shapeshifting. He’d be an awesome on-screen foe.