Blizzard Entertainment is currently looking for new staff to work on an “Unannounced Game Title”. By the way, this seems to be a totally different project to the company’s “Next-Gen MMO”.
The job description for the new role explains that Blizzard is “on the hunt for a creatively minded and talented individual to serve as tools engineer for its newest game team.”
If this really is a separate game to the Next-Gen MMO code-named “Titan”, then it is the fifth confirmed title in the works at Blizzard HQ. The company is already hard at work on two StarCraft II expansions and Diablo III, as well as the not-yet-announced MMO.