J-man, i'm sorry but you can't really just look at sales at this basic level to determine the size of a brand.
God of War came on a console after it's peak, while having much heavier competition and very high piracy levels.
Gears of War came on a infant console with little to no big titles, small level of piracy (considering the fact that piracy = ban from Xbox Live).
I'm not saying that God of War 3 is going to outsell Gears of War something, but it is a possibility, I personally can see GoW3 getting sales of as high as 5 million WW.
(Oh, and Gears is nowhere near the tier of games like Halo and GT)
Bet with Dr.A.Peter.Nintendo that Super Mario Galaxy 2 won't sell 15 million copies up to six months after it's release, the winner will get Avatar control for a week and signature control for a month.
Essay Pro