A four player co-op shooter RPG? Well damn, I’m interested. Kotaku’s got the latest screenshots of the game and a little Google research pulled up this on Wikipedia:

Little is currently known about gameplay, other than the game will feature four player cooperative play along with other singleplayer and multiplayer modes. In addition, players have access to customizable vehicles for “vehicular combat” and will also be able to customize their character. Deceased enemies will drop their equipment, which is available for you to pick up. You will be able to choose from 4 different playable characters, who each have their own unique abilities. It is inspired by the Mad Max film series and Diablo by Blizzard.

Emphasis added.

Got a street date of 9/1/2009 according to Gamestop and a vague 2009 release date on Wikipedia. Hopefully some gameplay footage will get out soon so we can get a feel for it. Oh, and it’s not cel-shaded. It’s “concept art style” (it’s really cel-shaded… and it looks pretty good).