It will sell 2.5million minimum.
Its has - Great Brand - Great Developer (AAA) - Its not a console port of a pc game - coming out in Christmas - Possible first use of a possibly great peripheral
I think two factors will be the difference between 2-4 million sales.
How good the supposed Xmote is.
How Well they pull it off.
If both the above go well its an AAA game that will make win another genre completely exclusively for the Xbox360 and pull in a halfmillion customers.
Tease.