Posted Wed, Jan 25, 2012 by Martuk
We're also heavily focused on getting Diablo III, Mists of Pandaria, and Heart of the Swarm into players’ hands as soon as possible. In light of our jam-packed schedule, we’ve decided to hold the next BlizzCon in 2013.
Blizzard will be holding its eSports competitions in Asia later this year for WoW and StarCraft II, so you can still at least look forward to that. Additional details about the eSports competitions will be revealed at a later date.
Source: BlizzCon website