Forza will sell well in Europe, that is for sure. The install base will be like 9.8 million when Forza2 was released. Now it is likely to be around 35-38 million. So I think a 3-4 million is possible without bundles.
GT5 we don't know when it will be released, if they manage to release it this xmas, sales will be like 9-10 million (with bundles)
Imagine not having GamePass on your console...







