Warner Brothers has declared Batman: Arkham City to be a triumph at stores, stating that 4.6 million copies of the game were shipped worldwide last week. This is, of course, a bit of subtle trickery on the PR wordsmiths over there, as this number is indicative only of how many copies are available for purchase, not how many have actually been sold.
I don't think they're putting the cart before the horse here. The game is going to sell exceptionally well if our review is any indication. I just always feel a little weird about these press releases whenever they come out. Sure, you want to pimp the success of your game, but bragging about how many units you've made has always seemed to me like a silly way to go about it.