Best Answer
The original Guitar Hero publisher RedOctane is being laid off by Activision. People who worked on the guitar software are going to keep their job and report to Activision. They have just lost ideas for more games. Activison posted a $233 Million net loss dealing with a large majority of them losing a bunch of money on their most recent game release Guitar Hero: Warriors of Rock. I can't say much for the DJ Hero series. It does not relate to the guitar hero section of Activision, but I might be wrong. However, Activision does not want to produce in the Music genre much more because of the fact it is a declining genre. Here is more info: http://mashable.com/2011/02/09/guitar-hero-dead/