Coldplay at RXP Takliberty Festival?

i would absolutely die to go to coldplay, but they have only been touring in the uk and other places outsife of the us. so in september they just so happen to be in nj!:) but the only thing is its very expensive and since it's a festival i wasnt sure if they would be on stage for that lond since lots of others are performing. would they do a normal amount of songs or a shortened amount? thanks in advance<3