I know it looks fantastic and stuff, but it's being released after the holidays in one of the "quiet" months so the legs will be non-existants. Plus it's an exclusive on the PS3 and the only PS3 exclusive that did great so far is MGS4 which is a proven quality title, unlike Killzone.
Currently playing on PS3: God of War III
Currently playing on Xbox360: Final Fantasy XIII
Currently playing on NDS: Chrono Trigger