Now i dont know the exact numbers of devs on WoW, but lets say its about a 100.
Why would they suddenly need 200 developers, when they JUST did an entire graphical improvement overhaul?
Double the devs could mean double the content, or half the production time. It could also mean they are working on something huge, along the scale of a WoW 2.0.
So what do you think? Why do they suddenly need double the capacity?