Bryan Singer looks to have departed X-Men: First Class as director due to scheduling conflicts, and will now only serve as producer on the X-Men prequel.The director is currently in pre-production with 'James and the Giant Killer' for Warner Bros, and Fox had hoped Singer would depart the dark 'Jack and the Beanstalk' re-imagining, so they could fast-track production on 'X-Men: First Class' for a 2011 release.
Studio enthusiasm for the film and especially Jamie Moss's script is what prompted Fox to move up the film's production schedule, resulting in Singer being unavailable to direct.
