Thor, originally scheduled to release May 20th, 2011, has been pushed up (not back!) to May 6, 2011. The new date is the same date as the original release date for Spider-man 4, which hasn’t changed its release date despite the fact that film hasn’t been moving forward.
Director Sam Raimi and Sony are still sorting through differences over the Spider-man 4 script, to put it vaguely. As news comes out for both of these films, updates will be posted..