There's absolutely no way they'll show a CG trailer for God of War, if they show it even. They've moved past that, I imagine. It's 016, and we can get such amazing trailers built with the game's engine that showcase the gameplay as well as hype people up with flashy antics. We don't need CG trailers anymore. It's not 2005. Not sure why publishers keep churning them out.
Also, as for the protagonist in God of War, didn't the concept art show Kratos? Or are you thinking that was a ruse of sorts? It just can't be someone else. Would kill all the anticipation I have for the game. His story hasn't ended. GoW3 end credits prove that.
Don't fuck this one up, Sony Santa Monica.