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.
Jan. 23rd Sam Smith
Jan. 29th-Feb. 6th MMJ's One Big Holiday
Mar. 27th the Decemberists
Mar. 31st Neil Diamond
Apr. 1st the Moody Blues
Apr. 18th Steve Winwood
May 1st-3rd Beale Street music fest
June 10th-15th Bonnaroo VIP
June 17th-20th Gentlemen of the Road Stopover: Waverly IA
July 22nd My Morning Jacket: ArtPark
July 24th-26th Newport Folk Fest
Aug. 14th My Morning Jacket: Red Rocks
August 29th Foo Fighters at Wrigley Field with Cheap
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.