It seems that Spider-Man 4's recent setback has left the studios scrambling to shuffle up their summer 2011 release deck, and now the cards have fallen into place. HitFix is reporting that Marvel Studios will move its summer 2011 tentpole Thor to the May 6, 2011 release date vacated by Spider-Man 4.

When one film shifts its release date, though, there are usually others that follow. Thor was originally set for release on May 20, 2011 and now that slot is open, Disney announced on their Twitter page that Pirates of the Caribbean: On Stranger Tides has taken the May 20 release slot.

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We'll be sure to keep you posted on any other release date changes as soon as we have more information.