One up is reporting that Guitar Hero: Warriors of Rock will be coming to the states Sept. 28th

“Year-to-date, the music category has been relatively quiet due in part to lack of new releases,” said Activision CFO Thomas Tippl during the call (via Eurogamer). “Warriors of Rock will be our only Guitar Hero release this year, and given its game quality and our full line-up of marketing activities, should generate consumer and retail excitement.”