As previously reported, Activision also confirmed that former Rage Against the Machine guitarist Tom Morello would appear as a boss in Guitar Hero III. After out-rocking Morello, players advance to an encore where they jam alongside the guitarist to the master track of "Bulls on Parade."

"Whenever I play Guitar Hero my opponent always kicks my ass on my own riffs. It's embarrassing," said Morello, according to the announcement. "Now that I'm actually IN the game I hope the digital me will win once in awhile!"