X-Men series involves someone finding a "cure" for mutant genes, causing Magneto to start recruiting for a mutant uprising. Also, Jean Grey gets better (guys, It Was His Sled!), but evidently Came Back Wrong, because now she can kill you with her brain. Rogue takes the cure voluntarily, on grounds that she Can't Have Sex, Ever. The X-Men move to defend the cure-making facility from Magneto's forces, and eventually "cure" him, which puts an end to his crusade. Unfortunately, Jean stays Ax Crazy, so Wolverine has to kill her, after which he returns to the Xavier Mansion to help Storm lead the next generation of X-Men.
This film provides examples of: