First class? This Marvel prequel — make that pre-prequel, since it antedates most of Wolverine — may suffer from too much class. Genteel Scottish heartthrob James McAvoy plays the young Professor X, and Teutonic-Irish demon lover Michael Fassbender is the man who will become Magneto. Next, expect the pre-pre-prequel, in which the two antagonists are brilliant infants dueling each other from adjacent speeding prams. 6/3