In light of MW2, what can Halo Reach do?

[donsterydo2]

I checked yesterday the numbers for MW1 for X360, it's almost 8m - Wow.

It's safe to assume that Reach will start with first week sales at about 7m mark. Halo is a giant, even ODST has great legs with 3 last weeks at 80k, Halo 3 every week 20-30k.