Well here are my prediction:
Q1: Halo Wars will outsell Killzone 2.
GTA DLC #1 will sell over 1 million DLC.
At GDC: Bioshock 2 will be announced as a 360 timed exclusive.
Mass Effect 2 is announced and will be X360 exclusive.
Q2: At E3:
Forza 3, Killer Instinct, and Dead Rising 2 announced for fall release.
Megaton announcement for Microsoft: xbox wiimote(newton) announced with games being distributed via xbox live and will be bundled with every Arcade Unit at $199. Diablo 3 is announced and will be x360 console exclusive with cross platform online gaming with PC. And before the end of the conference, Peter Jackson came out of the stand and announced Halo Chronicles!
Q4: Halo OSDT released and sold 3 million copies in one day.
Alan Wake, Splinter Cell Convicton, Killer Instinct, Forza 3, Diablo 3, Mass Effect 2, Bioshoick 2, and Halo OSDT and Dead Rising 2 will be too much for the PS3 come this fall.