This was never their goal. In a conference call earlier in the year, or perhaps late last year, they outlined a plan to release a title a year, but this was NEVER intended to be only WoW titles. 2010 they will have released two (Sc2 and Cata). 2011 they will (hopefully) release another (Diablo 3 or a Heart of the Swarm). 2012 another. Etc.