Blizzard's next game not related to WoW

As you probably know by now, Activision and Blizzard recently merged just a few days ago. As expected, they've announced a new massive multiplayer online game for PC, and give or take it's not related to World of Warcraft. They also confirmed that the game will not be similar to anything that the companies' ever done before, but they're probably implying in terms of the game's theme. Obviously when more news of this mysterious title is announced, I'll report on it.