Aye, not sure how many shows to expect, if it'll be a full tour or just a handful of shows. Preparing myself for the prospect of travelling to mainland Europe if there isn't a UK show.
Song wise, of course I'm hoping for rarities. "Holy Water", as you say Muppet, would be a treat. If they can somehow get Kiske along (maybe as a support act, in one form or another) then "Judas at the Opera" would be ace. Not sure if to expect songs they've never done before, although it seems to be something they've been doing recently so who knows.
Others I'd like to see (that they've played before) - obviously not expecting all of them:
Under the Moon
Down to the Devil
Spooks in the Attic
Painting on the Wall
The Eternal Wayfarer (sounded a little rough round the edges from the live vid on youtube though)
Theater of Salvation (aka the holy grail)
Never played (that I know of):
Rise of the Morning Glory
Sabre & Torch
Not asking for much am I?
In all honesty though, like Muppet above, I'd just be happy to be there.