Any guesses or confirmations for this year yet? I'm guessing if they do the typical two nights of mainstream vs. alternative/indie, it will look something like this:
Alice In Chains
30 Seconds to Mars
Cage the Elephant
As for headliners, I don't know. Green Day? Weezer? Pearl Jam? Muse for 2nd day obviously. The lineups look the same every year IMO anyway, trade a few bands in and out.