Okay, so.......
He said that one would "cement the PP name", i think i also remember that he said that this band that he spoke of was power metal.
Knowing that one is a returning band.....i would have to figure that a returning band would not be "cementing" anything.
So this means that one of the headliners is Power Metal, has never been to PP before, and will "cement the name" (which i guess means, there will be no doubts that they should headline and they are a defining act somewhere in the genre). So for this headliner who could it be?
I would have to say either Rhapsody, Helloween, Iced Earth (if they are considered Power Metal) or Hammerfall. These are the only one that fit the description that i can think of.
As for the second headliner....this is a returning band. We know that because he said there would be two returning bands and the only other thus far is JOP. He also said that it would be a Prog/Power band......now i don't know if when Glenn typed that he meant it was a progressive power metal band.....or did he just mean it as Prog....or....Power?
Assuming that he meant that it was a band that crossed over into both of these genres, the only bands that could fit that description (that are "so-called" headlining material) are Angra and Kamelot. I remember he stated that there would be no question that the two headliners were headliner material. So this counts out all those borderline returners that may be able to headline in another year out.
So unless some of the things that he stated are now outdated due to reasons unknown....i would say that the headliners will be two of those mentioned above.
I guess i will take a guess at it....i'll go with
Rhapsody and Angra. 
I am picking Rhapsody because i kinda want them the most out of the four power metal options, and Angra because they have not toured the US regularly like Kamelot.
That's my guess and i'm sticking to it....unless i change my mind.
)
