Absolutely not. It will "INFLUENCE" it, but not determine it.
Too many other important titles are still coming out to go that far, LET ALONE IT STILL COST $400!!!!...FFXIII, FFvsXIII, KZII, White Knight Chronicles, Gran Turismo 5, God of War 3, Little Big Planet, SOCOM Confrontation, Tekken 6 just to name a FEW.
It DEFINITELY won't determine it; however, it is an important appetizer.
PSN ID: Sorrow880
Gamertag: Sorrow80
Wii #: 8132 1076 3416 7450