
X-Men: First Class is the name of a best-selling 2006 X-Men limited series and 2007 mini-series imagining the very early adventures of Professor Xavier's first group of mutant students: Cyclops, Marvel Girl, Iceman, Angel, and The Beast. The X-Men sported revamped costumes and the stories included other characters such as Lizard, Quicksilver, Scarlet Witch, Man-Thing, Gorilla-Man, and Thor.
I guess a prequel of sorts is the only way you could really have another X-Men movie (seeing as Brett Ratner killed off Xavier, Cyclops and Jean Grey plus the entire franchise for that matter, with Last Stand...). I wonder though who would play a younger Xavier in the new film? Patrick Stewart would be far too old by that point to play a youthful version... We'll have to wait to see if this is all true, at this point I hope not!