There used to be three certainties in life: death, taxes and at least one annual entry in Activision's Guitar Hero franchise, but now that list is back down to two, as the company announces its Guitar Hero business unit is officially disbanded.

The announcement came in an earnings report in which Activision Blizzard posted net revenues of $4.45 billion for calendar year 2010:

At the same time, due to continued declines in the music genre, the company will disband Activision Publishing’s Guitar Hero business unit and discontinue development on its Guitar Hero game for 2011. The company also will stop development on True Crime: Hong Kong™. These decisions are based on the desire to focus on the greatest opportunities that the company currently has to create the world’s best interactive entertainment experiences.

The Guitar Hero franchise's invisibility on shop shelves this year will be mirrored – if such a thing is possible – by the lack of other music games from Activision, with the company also confirming there will be no DJ Hero games released this year. Gamers waiting to scratch it up in DJ Hero 3D may be in for a long, perhaps never-ending wait.