Chuck,
I feel ANY quality/classic song have an EQUAL chance of being played. I haven't seen Testament in years and I would be SORELY disappointed if only a few of the classic songs are played in favor of the new stuff, just for the sake of playing new songs.
I never like it when bands try to force feed their fans new material just because it's new. Good songs should be played no matter if they are old or new.
I HOPE you will be playing alot of the "classics" on the 70,000 Tons of Metal Cruise since you will have 2 shows and plenty of time to play old and new songs.
I think The Formation of Damnation is a great album. BUT I don't want to hear 5-6 songs from it at the expense of NOT playing:
Into the Pit, The New Order, Trial By Fire, Disciples of the Watch, Practice What you Preach, Over the Wall or Apocalyptic City.
Thanks for asking the fans what they want, I wish more bands did this.