The biggest hindrance to MW2's sales would be MW3 release in 2 years. MW3 is most likely just going to be an update to "mw2" forcing people to move on to the new game (especially due to the MP aspect). This completely kills the sales of the previous iteration. This would be unlike GTA games where each iteration can stand on its own two feet
@6 mil would only be possible if pirated PC copies are included lol
"Dr. Tenma, according to you, lives are equal. That's why I live today. But you must have realised it by now...the only thing people are equal in is death"---Johann Liebert (MONSTER)
"WAR is a racket. It always has been.
It is possibly the oldest, easily the most profitable, surely the most vicious. It is the only one international in scope. It is the only one in which the profits are reckoned in dollars and the losses in lives"---Maj. Gen. Smedley Butler