In the interview, Kotick tells VentureBeat that he had a “really cool vision” for the next Guitar Hero game, but unfortunately, Activision didn’t have “the resouces” to do it.
The last game to be released in the Guitar Hero series was Guitar Hero Live in 2015.
“I had a really cool vision for what the next Guitar Hero would be, and realized we don’t have the resources to do that.”
Personally, I really enjoyed the games, especially Guitar Hero 2, which I feel had a banging soundtrack.