As pointed out on The Tool Hotline, the reference to Guitar Hero 4 on Alan Jones‘ website has been removed. I guess maybe Tool (or Neversoft) aren’t ready to reveal this snippet yet. Despite the removal of this info, I consider the Guitar Hero rumours fact rather than speculation.
Also, according to this article on IMDB, Maynard is appearing as the Hippie/Chauffeur/Pilot/Bartender/Butler/Bait Shop Clerk in the upcoming David Michaels movie The Other Side. Thanks to Henry for the tip there.