Super Mario Galaxy vs. Halo 3 - Which game will sell more units overall?

[HappySqurriel]

I really can't say for sure ...

If the XBox 360 doesn't get a price cut in the next couple of months Halo 3 will be the worst selling of the Halo games; if the XBox 360 does get a price cut I think it will come down to which game can keep people buying copies in the next 12 to 18 months...