God of War is probably closer to 4 mil and God of War 2 is probably already over 3 mil, the reason I say that is because those Others numbers for both of those games are way outdated.
With that said, I think Gran Turismo 5 will outsell it, FFXIII will outsell it and CoD6 will outsell it. Maybe even Madden '10, Fifa '10 and PES '10, GoW games have always been about legs, crap I remember when people were questioning if CoO would ever make it to a million (it did even without the bundles punks).