Shrek 4: Forever After has a big change, Shrek goes to a Parallel Universe, where Donkey doesn’t know him, Fiona is a hated ogre and Puss is a fat cat, they practically TURNED PUSS INTO GARFIELD!
So the trailer promises this is the FINAL CHAPTER, so the next Shrek movie could be a prequel.
Release Date: USA 21 May 2010, Australia 17 June 2010, UK 9 July 2010, Germany and NL 8 July 2010
Director: Mike Mitchell
[ 
Spoiler]
This Parallel Universe is a result of Rumpelstiltskin magic, who was supossed to be voiced by Paul McCartney, but at the end it is voiced by Walt Dohrn.
Here is a picture of the dwarf:
And the poster is this one:
Both images confirm that DreamWorks always produces characters doing the one eyebrow up face:
