I think some people here are severely underestimating the power of the Halo brand in America.
I predict somewhere between 1-2 million the first couple days of release. Lifetime sales upwards of 5-6 million. I'm going to go under the assumption that somewhere between 30-40 percent of all Halo 3 owners will immediately want to pick this up. You will also get GoW fans who are being extremely swayed by the games equivolent of "Horde Mode". Then you have new fans who will be sucked in by Marketing Hype. Then you will also have fans that will be tempted by the fact that the main hero is a human, and the game will be played in a much more stealthy manner.
It will probably raise system sales by 10-15 percent for a few weeks.







