6. Mojo
Mojo is primarily an enemy of the X-Men, one of the so-called "Spineless Ones", a member of an alien race that cannot move without the help of technology. Mojo runs the Mojoverse, an alternate dimension where all of the denizens are forever addicted to his gladiatorial TV shows, for the character is quite clearly a pointed satire of excessive, ratings-grabbing network television. Mojo flies around on a mechanical platform equipped with particle beams, and he's also kitted out with a robotic arm that can slice through enemies. In addition to this, he also possesses magical powers which gain power from the worship of his TV programs, and is one of the few Marvel characters who cannot be affected by Rogue's touch. Instead, Mojo has his own power of touch, able to age humans with just a single grasp. Short of curtailing the entire satirical element, there's just no chance that an X-Men movie - given that they're distributed by entertainment conglomerate Fox - is going to dare rail against big media corporations.