No undercard really sucks, especially considering that half of these headliners aren't worth shit live anymore. You couldn't get me into night 2 at gunpoint.
Almost feel bad for Lars Ulrich, having to follow the greatest drummer alive, but Metallica's fans won't care. Personally, I'd be heading for the exit real fucking quick after Tool finishes their set.
GnR and Maiden are such an odd pairing; it could completely bomb or be beyond awesome.