assuming none of these games suck
Halo ODST = 5 million before year end (2.5 million first week / 4 million in first month)
Modern Warfare 2 = 5 million before year end on xbox, but what may come as a surprise to some is that the PS3 version will hang with the xbox version.
Assassins Creed 2 = Maybe sometime next year, but only if this one is better then the last one and not more of the same game.
Forza 3 = I am not convinced that this game ever gets to 5 million unless it has super long legs. The only chance I see is if they package a some sort of ODST related pack in, and I doubt they would bundle it on the Holiday bundle so soon in the year. I am predicting the holiday bundle will probably contain ghostbusters and a Transformers related game.
I have 2 outside shots
Bioshock 2 and Lost Planet 2 = I think it is reasonable to expect both of these games to be huge especially now that the install base of the xbox is over double what it was back in 2007 and many late xbox 360 owners bought these games on the used side.
