It always seemed to me like World of Warcraft WAS Diablo 3. All of the MMORPG innovations you find in WoW seem to have been in rudimentary form in Diablo 2's online form, and it seems like WoW contains all of the things that Blizzard wish they could have done in D2.
I *LOVE* Diablo 2 but I don't see the point of yet another fantasy-based MMORPG.
With our luck it'll be a cell-phone version of WoW. So many of the job ads Blizzard has posted over the past few years have been for mobile content developers, they've gotta be paying them to do SOMETHING.