I doubt it will. Looking at the charts, Forza 2 probably wouldn't be too far past 2 million without bundles. I really can't see Forza 3 getting the same bundles as Forza 2 got (in terms of sheer numbers).
As for GT5 beating Forza 3's LTD sales in the first week? Possible, especially considering how well GT5P has sold and that GT5 will be the first full GT game this gen.











