We can't really say until next spring...in movies for example, a decent film has a 2.7 multiple, which means you multiply the opening weekend to get where it's going to finish. For huge blockbusters, it drops a bit, but others buck the trend...TDK for example. For the 3 biggest opening weeks on the 360, it's followed this trend, so it's going to be interesting to see if this rule of thumb holds:
Halo 3 - 2.71
GTA4 - 2.16
GeOW2 - 2.74
By spring, I think it's going to be much easier to project where MW2 will end up, but at this point, it's a bit presumptuous to assume it's going to run a Halo 3 Multiple.








