I guess it at least partially has to do with the criticism that there's too much time in between their expansions and the fact that there's always some MMO launching each quarter, they need to turn it up a notch to stay King of the Hill. Luckily they had notches left.

Pretty much every current MMO has been sitting on just that information though and this is Blizzard after all, they've had some experience and I have no doubt they'll pull it off.

Should be good to watch, better to play. Can't wait.