Sorry for the poor translation. Fayerwayer.com writes:
To warm the engines before Guitar Hero 4, people from Activision will launch this Sunday to market an edition of Aerosmith based on the engine of Guitar Hero 3, which follows the complete career with a guitar especially for the occasion.
But thanks to the people of Playware, who made the exclusive launch in Chile days earlier than in North America, we could try a few hours ago in PS3 and Xbox 360. The game is basically the same as Guitar Hero 3, but with 25 songs by Aerosmith, Joe Perry of 4 and 12 bands teloneras as The Kinks, The Black Crowes, Stone Temple Pilots and more