11. Moon Bloodgood - Psylocke
Officially we've already seen Psylocke in the X-Men franchise, but thanks to Bryan Singer's destruction of The Last Stand, there's no reason for anyone to really pay attention to the fact, considering we'll all feel better that way. The mooted introduction of a young Jean Grey (more of which later) opens up the opportunity for Singer to create a villainous mirror for her among Apocalypse's followers, and who better to fit the bill than the mutant who inexplicably acquired Grey's powers in the comics? Psylocke was of course a member of Apocalypse's Four Horsemen when her mission to assassinate the villain was unsuccessful and she was transformed by Archangel (who was set free by Apocalypse from Pyslocke's psychic controls) into one of his fellow horsemen. That would represent the best way to integrate the character as a villain. Bloodgood, who is currently starring in Falling Skies would be a strong candidate for the role: beautiful and undoubtedly skilled enough to pull off an ethereally evil villain, she already boasts geek credentials and would ensure Psylocke didn't fade into the background.