This first photo from Matthew Vaughn's X-MEN: FIRST CLASS doesn't look like much yet, but this leaked onto the Internet today and I'm sure a higher res version will be coming soon. So far... not too impressed, although the idea of Michael Fassbinder and James MacAvoy going at it as Magneto and Xavier sounds pretty cool in theory.
Left to right: Michael Fassbinder as Magneto, Rose Byrne as Moira MacTaggert, January Jones as Emma Frost, Jason Flemyng as Azazel, Nicholas Hoult as Beast, Lucas Till as Havoc, Zoe Kravitz as Angel Salvadore, Jennifer Lawrence as Mystique, and James MacAvoy as Charles Xavier.
I think this wasn't intended to be released yet (the heads look strange on the bodies) and I'm sure we'll see something more high res and color matched in the next few days. Until then, speculate at will!