First off, I thought it was Angel Dust who stole last years show (not that Evergrey, SX, Kamelot and Ark weren't all awesome). Although I would have listed Angel Dust as my 5th favorite band among the 10 that performed at PP 2.0, they came through Earth Link Live like a freight train, and left the place a smoldering wreck.
I agree with the poster who said that Zero Hour will be impressive, but may be a tad on the dull side, from a pure performance stand point. I just don't think their music lends itself to "rocking the house". Obviously, this is just a guess, as I've never seen them live. I think Silent Force's catalogue is simply too weak to tare down the house, but I hope I'm wrong. I think Devin will be the act that sends everyone back to the booths to buy his CDs. I think his material and energy will come across well live. However, I believe it will be Edguy that will be this year's Angel Dust. They have a fist-pumping catalogue, and when combined with Tobias' awesome pipes, I think it will make for a deadly combination. Mind you, Edguy wouldnt even crack a list of my current 10 favorite bands, but I feel that their music lends itself to getting PP 3.0 nuts.
GZ