Just announced today.
Warhammer 40,000: Kill Team preview at IGN.
Looks like it will be a third person XBLA/PSN title for about $10. Highlight list so far:
- Local co-op (not sure about online co-op).
- Choose either ranged or melee characters with upgradable weapons.
- Playing through the first chapter will unlock the power sword for the upcoming Space Marine game.
I'll be picking this one up as soon as it launches. Looks like a nice fun title for $10.