User blog comment:Dengarde/Case West: Scheduled for release in mid December/@comment-400444-20101201143134

Well a website finally gave us a tentative release date.

http://www.ign.com/videos/2010/11/30/dead-rising-2-case-west-extreme-european-trailer

Under the game details section half way down the page and on the right hand side of the screen, the release is December 30th for all regions.