Paramount has just debuted the teaser trailer and a new movie poster for the fourth installment from the Shrek franchise, “Shrek Forever After.” According to the poster and teaser we’re to believe that this is the last and final chapter to the undying Shrek trilogy (not counting the Puss in Boots spin off).

“Shrek Forever After” will follow the style of “It’s a Wonderful Life” where Shrek makes a deal with Rumpelstiltskin to get his ogre mojo back but instead sees what Far, Far Away would be like if he had never existed.

“Shrek Forever After” will tumble its way to theaters in 3D and IMAX 3D on May 21, 2010.