Well, this lineup did play Killers and SIASL (the latter only a few times, though) during the Ed Huntour. As for SSOASS, it will have to be the central epic song for this tour, there's no two ways about it. But I admit that SIASL is a very long shot.
This is the original Maiden England setlist:
Moonchild (sure thing)
The Evil That Men Do (sure thing)
The Prisoner
Still Life
Die With Your Boots On
Infinite Dreams (75% probability)
Killers
Can I Play With Madness (sure thing)
Heaven Can Wait (90% probability, they never miss the chance to play it, although I think it's been overplayed)
Wasted Years (90% probability, as they've played it recently)
The Clairvoyant (sure thing)
Seventh Son Of A Seventh Son (99% probability)
The Number Of The Beast (sure thing)
Hallowed Be Thy Name (sure thing)
Iron Maiden (sure thing)
What's left is The Prisoner (hasn't been played since the early '90s; was overlooked during NOTB's 25th anniversary, but I guess it's one of Bruce's favorite tracks, I hope he'll lobby for it), Still Life (hasn't been played since the SSOASS tour; I'll be truly surprised if they decide to play it), DWYBO (been played on several greatest hits tours and last time during the first history tour, I'd say it has a better chance than any of the other "unlikely" songs) and Killers (last time played during Ed Huntour; overlooked during the Early Days tour, so it will also probably be ignored).
In my opinion (opinion of a longtime fan like most of the people here), they made a mistake when they decided to expand the Powerslave history tour to include the four SSOASS songs because now, in my mind, these are the songs that have been played recently and I'd rather hear other songs from the Maiden England setlist.