02/08 Tool 02/11 Jeff Mangum 02/17 of Montreal 02/29 Blind Pilot 03/31 The Naked & The Famous 05/14 M83 and I Break Horses 05/19 Flaming Lips, Young the Giant, Dawes and AWOLNATION 06/07 Bonnaroo 2012!!! 06/13 Roger Waters 07/28 Toadies
He's playing Jazzfest so he's definitely a possibility.
Don't think he has played Roo in a while, either, so wouldn't be shocked at all if they brought him back.
Relentless7 with Ben Harper were there in 2009. I think having an album with Charlie Musselwhite makes it likely, especially since they're doing other festivals together. I'd be surprised if they're not there.
"The problem with GnR is that they suck. The songs suck. Even when they were in their prime they sucked. Remnants of an era of misogynistic sunset strip garbage. Bros who dressed like girls but still acted like high school jocks.