Well, would you rather pass crack out to strangers.. or pass it to people that already love it. I personally would wait and give big news to fans, simply because of word of mouth. picture this. you annouce it at BlizzCon. Before peoples jaws even drop people are already on the phone telling other people. fans telling fans, fans telling their clans, clans telling other clans. websites start getting spammed, no sam I dont like green eggs and ham. but I do however have a plan. aha, So, you see where I'm going? Computers are kicking on.. theres riots perhaps, fat geeks are running into walls. the gamer girls are crying. mmos are suffer huge money loses from fans flockingthe Tvs, phones and computers.. all the xboxs and ps2s getting all dusty,, and I'm ranting. so yeah.its wiser to pop a question on home turf.
prolly the next Blizzcon will be after WoW: Burning Crusade and before E3, 2007. Would make sense to announce the 2 unannounced titles in their own event. After all there wont be any other games to take their glory either