Sony should whip Guerrilla to get Killzone out one month before Halo 3, like in October (assuming Halo 3 doesn't come out earlier). It's better to go up against a fresh GTAIV and little else than it is to go up against the November blitz of cumulative GTAIV sales, a huge FPS in the shape of Halo 3 and countless other mainstream titles. If Killzone's any good, word of mouth should carry it throughout the holidays.