I could do without Clapton. Saw him a few years ago and he obviously did not give a shit. Definitely going through the motions. He's been pretty open in interviews about how much he hates the road these days.
5/8 Shobaleader One (Squarepusher) 5/14 Deftones 6/11 Gogol Bordello 7/2 Slipknot/Marilyn Manson 9/14-9/16 RIOT FEST CHICAGO 10/1 Prophets of Rage 10/9 Dopapod 10/11 Korn 10/28 Pennywise 11/1 Puscifer 11/4-11/5 EDC Orlando 11/11-11/13 Zen Awakening Festival
I may be in the minority here, but I think the most likely legacy headliner next year is U2. They're working on a double LP, planning a new tour, have expressed interest in American festivals and are on AC's wishlist.