The secret origin of the X-Men as we see how Xavier and Magneto met, how the X-Men were formed, and what really precipitated the Cuban Missile Crisis. The great superhero movie rewatch revisits the X-franchise for the month of December, starting with X-Men: First Class.
Having said that, the movie is a bit overcrowded. Pyro changing loyalties in X2 was beautifully played and perfectly constructed. Salvadore’s similar change was not, and it’s mostly because the movie didn’t give us enough time to get to know her—or, really, anyone else beyond Xavier, Magneto, and Mystique. Darwin’s death is robbed of its poignancy by the character not having enough screen time. (Though Edi Gathegi, as usual, imbues him with tremendous charm.) Hoult doesn’t quite sell McCoy’s desire to normalize his feet in order to assimilate, especially since he’d already assimilated just fine before Xavier showed up. And none of Shaw’s Hellfire Club minions have any personality at all. Azazel is just a plot device in a devil suit, Frost—a fascinating and complex character in the comics—is just a plot device in white lingerie, and Riptide isn’t even really a plot device, he’s just kinda there.