Before Sam Raimi’s Spiderman films, before Iron Man, the Avengers and even Marvel Studios, before Christopher Nolan’s Batman, there was X-Men. The film that jumpstarted this comic book movie boom, Bryan Singer’s effort from 2000 remains perhaps the best installment in the series, along with the sequel that followed, X-2: X-Men United. Then Singer jumped ship to helm Superman Returns and the franchise went belly up with a series of misfires. That is until Matthew Vaughn restored some prestige with X-Men: First Class. But now Singer is back and he’s brought a few friends along too. Days of Future Past…