One. Halo 3.
I think a platinum pricing for COD4 could help it over the 9mil mark by the end of the gen, but I think it will ultimately fall short.
ODST doesn't have a chance in hell of hitting 10mil.
If I'm being honest, I think the Halo franchise peaked in popularity with H3 and with the COD series propelled to great heights, and the Gears franchise another side attraction, I don't think we'll see another Halo title hit 10mil - so I conclude that Reach will not make it either.
Forza 3, Gears 3 and AC2 are all ridiculous suggestions.







