I know it's less popular than OutsideLands by a mile but I figure if the 2017 OutsideLands thread is up (an August festival) I could launch the next BottleRock thread (May).
The Festival is to once again occur Memorial day weekend (Friday May 26th through Sunday May 28th).
Sounds like thus far: Green Day, Kings of Leon, Arcade Fire, Metallica, and Pearl Jam are all in play as potential headliners. Roger Waters is out as has been pointed out over on the OutsideLands thread (not that I thought BottleRock would get him before OutsideLands).
Any predictions for headliners and undercard? I'd imagine they probably have more of a budget to work with after the financial success of the last couple of years.