Coming this winter to the PS3:

Play Station AllStars Battle Royale
It's a fighting game with Sony characters, and a few others. Yes, you've seen games like this before, although I don't know where. (cough) But since PS3 players can't play that one, well, here's one for you.
Announced characters so far include Kratos, Radec from Killzone, PaRappa the Rapper, Sly Cooper, Sweet Tooth and a Fat Princess. The above pic also shows Cole from inFamous, What'shername from Heavenly Sword, and I think that's Daxter & Jax, Ratchet and I guess that's supposed to be Nathan Drake on the left bottom. No idea who the far left guy is though. Levels include ones based on Little Big Planet, Patapon, Buzz and God of War.