My expectations have already been exceeded; I've already seen almost every one of my most begged-for bands play ProgPower USA (Jag Panzer, Tad Morose, Wuthering Heights, Redemption, Gamma Ray, Steel Prophet, and two different permutations of Savatage, and I'll be seeing Stratovarius this year). Either I've been very lucky with PPUSA, or Harv actually books bands based solely on my begging. LOL
The only headliner-level band I can think of, that I haven't already seen play the fest, is Morgana Lefay, and I've already seen them headline Powerfest. Jag Panzer or Tad Morose would also make an awesome headliner. Maybe Helloween, as well; it's been decades since they had the US presence that Glenn usually steers away from when he picks bands for the festival.