Blizzard have just announced via their official page that this year they will be hosting a new event, titled "2012 Battle.net World Championship Event".

In light of this new event, Blizzard have decided to withhold the annual Blizzcon event for this year only, which is quite sad as this is usually the time of new announcements and juicy info.
Blizzard Entertainment is proud to announce the 2012 Battle.net World Championship, a major global eSports event featuring some of the best pro-gaming competition in the world.

Slated to take place in Asia toward the end of 2012, the Battle.net World Championship will host this year’s StarCraft II and World of Warcraft Arena World Championship tournaments.

Blizzard gamers and eSports fans from around the world will be invited to attend and witness some of the most skilled pro players on the planet battle it out for cash and glory.
It's no wonder that with 3 major title releases coming out this year (Diablo 3, World of Warcraft: Mists of Pandaria and StartCraft II: Heart of the Swarm) that it would be wise to give full concentration to these titles.

Let's just hope that with this new event that we can still get some new gossip about any of Blizzard's projects, especially the next-gen MMO, Titan.