Modern Warfare 2 is going to sell over 9 million on PS3, maybe even 9.5-10 million, at this rate even if it's stabilizes at Modern Warfare 1's rate of legs.
Without lots of bundles I don't think GT5 will outsell MW2. GT games always had quite a lot of bundles, right?
Thanks to bundles GT5 will outsell MW2 though, because it will sell over 10 mill guaranteed.