According to Variety Paramount and Dreamworks have set a release date for Transformers 3, July 1st 2011. No news on whether Michael Bay, Shia LaBeouf or Megan Fox have officially signed on, but they will most likely be back.
2011 is turning into one hell of a Summer. We will be getting Spider-Man 4 and Thor in May, and The First Avenger: Captain America and Harry Potter
and the Deathly Hallows: Part II in July.