The best selling PS2 game sold 18 million (Grand Theft Auto: San Andreas). The second best selling PS2 game sold 14.9 million (Gran Turismo 3: A-Spec). And this is on a userbase of 130 million PS2s.
Since COD4:MW has currently sold 12.3 million, my guess is that MW2 will sell between 13-14 million.
A lot of you are estimating that it would sell 10 million on the 360 alone, which would be near Halo 3 numbers. I do not expect Activision to spend the same amount on marketing like Microsoft did, and neither do I expect to see as many console hardware bundles as Halo 3 had. Based on that I would expect 360 sales to be 8 million and change.







