It doesn't matter WHAT they're gonna play, the main thing is THAT they gonna play. And for sure, they play most of the songs from ATS and surely they know, that we want to hear some older songs.
Like LinkinParkHotspur said. In so many forums, they can find out, which songs we like and which songs we don't like. And maybe so they can do their setlist for the tour. Maybe :-)
And maybe maybe maybe...they do something special for the HT Birthday. (is in october? Am I right). But I don't want that they play more HT than ATS or other albums. It's the tour for the ATS album, so they should play it, or not?