It'd be interesting to see if they do any post-Waters Floyd (probably not) or if they perform any Roger solo songs (The Tide is Turning or Each Small Candle) as those songs ironically would be appropriate.
Nevertheless, I think we'll get a "classic" setlist of Wish, Time, Comf. Numb, maybe Another Brick, maybe Money. Hopefully they'll throw in Shine On I-V or something a bit less obvious (One of These Days or Pigs on the Wing or something).
I'm reading all the quotes as if it is a one-off event. The only member of Floyd that wants to spend six months doing a world tour is Nick Mason. Waters has his own projects and Gilmour can't be bothered at this point.
Nevertheless, I'm thrilled about the reunion. Those guys should play together, they have so much shared history and Waters' lyrics and concepts are the perfect complement to Gilmour's music. Congrats to Roger for burying his (considerable) ego and making the phone call and to Dave for giving the go signal and getting everyone on board.