Well lessee...
Neil Young, if he doesn't have a wedding schedule conflict.
Jeff Tweedy, with Wilco or his solo, his choice, and/or
Jay Farrar, with Son Volt or without, do he and Jeff get along these days?
Trampled By Turtles
Infamous Stringdusters
Sam Beam with whatever Iron & Wine incarnation
Burns/Convertino and whatever version of Calexico
I hope Greensky Bluegrass is just a given by now
I hope they got Yo-Yo Ma booked 3 years ago for 2015 so we can hear some Goat Rodeo
Then connect the dots to a Crooked Still get-together
I second (or third) the Rawlings/Welch with emphasis on Welch
Jason Isbell (yes, again)
Patty Griffin
Neko Case
Neutral Milk Hotel if they're out and about (their live show in Abq last year was great)
Tea Leaf Green for something different
Drew Kennedy (his last two albums have been really good)
and finally, They Who Shall Not Be Named
(which is actually a pretty good band name, but this is the place-holder for the band or individual performer that you, dear reader, do not want to see at the festival, and you'll gripe about it, but they'll be there anyway)
If they're not already up there on my list, that is...
Mix some of these in with the cast of regulars and you got yourself a
feeessstttiiivaaaalll!