This will be a 6 film long story arc. So basically we start of with the First Class members (Cyclops, Jean Grey, Iceman, Angel and Beast) as well as Xavier and Magneto (who's as this point "good) trying to track down a shapeshifting mutant (Mystique) who's hunting down acclaimed scientist and mutant hater Bolivar Trask for experimenting on mutants. It's later revealed that Mystique was working with Magneto all along, and he betrays them. The following 4 movies will follow the First Class (as well as some few new recruits) fighting a different villain who Magneto eventually recruits. The sixth movie is Magneto and the Brotherhood attacking Charles Xavier's school for, in Magneto's words "wronging the Mutant kind". They duke it out and Charles and the X-Men end up loosing, causing Charles to use Cerebro and finding other Mutants, who he contacts through his telepathic powers and calls for help. The X-Men continue fighting as more and more Mutants showing up to help them. Magneto's brotherhood is eventually beaten and some killed, and that was the last time the world say Magento.
