The reliably spoilerific Australian Classifications Board has revealed an unannounced Warhammer 40,000 title.
Warhammer 40,000: Kill Team, which was classified M15 on May 27, is listed as a multiplatform game from THQ Digital Studios UK.
As Joystiq points out, in the Warhammer 40,000 canon, a kill-team is a specialised unit of space marines.
Given the developer and suggestive title, we could be looking at a tie-in promotional game for the upcoming Warhammer 40,000: Space Marine, much like Red Faction: Battlegrounds.
Space Marine has not yet been rated, and is due for release on PC, PlayStation 3, and Xbox 360 in September.