I have to imagine this has to do with Axl's influence. He is a fan and as a fan I'm sure he'd want to sing several of the forgotten classics (like "Touch Too Much"). I can see them doing "Overdose", "Go Down", "Cold Hearted Man", "Live Wire". They should even pull out "It's A Long Way To The Top" for the last show of the tour.
If anyone hears anything of bagpipers being paid to play a gig in the same city as an AC/DC concert, their's going to probably be some Hell Freezes Over level stuff going on. (Not saying AC/DC need bagpipes on It's A Long Way To The Top, they've done it both with and without them, but if they are only going to do it once more, it needs to be done like this band did it:
Let the bagpiper come out on the stage, not necessarily front and center, but enough to get attention, after the cannons finish firing and the dust settles (like Shot Down In Flames on the Stiff Upper Live Live DVD), Stevie kicks in...and all hell breaks loose since it will be the single most controversial moment in recent AC/DC history since, well, everything in the last year.
Weird. The last two shows they've gone static again. It is an admittedly cool, static setlist, but why build up so much excitement with a beginning-to-be-dynamic setlist only to revert back to, "This is safe. Let's keep doing that..."