Here's our first analysis of Wrath sales (actually second, if you count Mike Morhaime's take on the subject): someone thinks it's going to sell big. Gamasutra reports that Mike Hickey of Janco Partners is predicting sales of five million copies for Wrath's first month in stores, which would basically make it the most popular expansion pack of all time. Burning Crusade, a pack that just barely beat out The Sims, sold 2.4 million copies in the first 24 hours, and 3.5 million within the first month, and so Hickey is looking at a little less than double that for the Northrend expansion.
Huge numbers indeed, and yet they don't seem that surprising -- WoW's population has grown since Burning Crusade was released for sure, and while pretty much everyone agrees that not all players will be buying the expansion right away (our own informal poll has about 13% of our readers waiting, not to mention all of the players in other markets around the world), but if even 1/4 of WoW's 11 million players decide to pick up the game on launch, we're still looking at 2.75 million copies, more than BC.
No matter what, Blizzard will make a lot of money, and very likely break all records anyway next week. Wrath of the Lich King will be huge.