Billzard while they may be a little smaller than some companys i sereiesly doubt if they would tell if their was going to b another Diablo i think they would wait for Blizzcon or wait to annouce it after the new WoW exspansion is published.:cool:
From a business perspective, it would be best not to release any information on it, till the WoW expansion frenzy is over. That way, there is maximum attention on each game.
Blizzard already confirmed they'll have a major project announcement in 2007. Didnt say when believe we'll have some news about Diablo 3 in near future.
Blizz con will tell if D3 is comin