i hope that we get TCOT again on the headlining tour. it was a fantastic encore and great addition to the catalogue. if i had to guess though, it will probably be replaced by TSF. i also imagine that the glass prison will become a regular. these walls would be an awesome inclusion to the set, and i wouldn't be surprised given the lack of octavarium songs on the PN09 tour (though it may be more likely that the root of all evil will come into the set).
personally, i'd love to hear under a glass moon reintroduced rather than metropolis, and while unlikely, it'd be cool to have TSCO come back.
oh, and if we're really dreaming, i'd wet myself if we got ACOS in its entirety.