Songs that should come back on the next tour (not necessarily all of them, but any of them would be fine with me) are TGP, 8VM, ACOS, ITNOG, and the other lengthy, "epic" tracks.
I thought I never had a hope of seeing ACOS or 8VM, but I hope either one comes back for this tour. I'm simply afraid that neither will show up due to Illumination Theory likely being played.