Bryan Singer may not direct the remake of “Logan’s Run” after all. Warner Bros. and producer Joel Silver want to start lensing the sci-fi pic this fall, which would mean Singer might end up shooting two tentpoles — “Logan’s” and a “Superman Returns” sequel — back-to-back. No one begrudges Singer for seeking a break from big-budget projects, although the filmmaker probably won’t make an official decision either way about “Logan’s Run” until “Superman Returns” bows in July. Assuming Singer’s take on the Caped Crusader is a crowd-pleaser, Warners plans to start shooting the sequel in the later part of 2007, with Singer again at the helm. There’s been buzz that “V for Vendetta” director James McTeigue might step in and helm “Logan’s Run,” but at this point it’s just rumor.