So, there are a few things that we can consider, if the 2015 tour would be a "career spamming slash warm up slash promoting the expectation of The Book of Souls" :
* They wouldn't play deep cuts from the "Maiden England Universe". So, no Moonchild, Infinite Dreams, ATSS, Revelations, Aces High, Killers, SSoaSS, The Prisioner. Probably not The Clairoyant too;
* Wrathchild and The Evil That Man Do would probably survive;
* Probably, they would play some other songs from the 00s. Brave New World would be a probable choice, considering they had it on the Chinese set, along with The Wicker Man;
* I seriously doubt they would cut both 2 Minutes to Midnight and Run to the Hills on this warm up tour. Considering Adrian's statement and the drop of RttH on 2010/11 tour, i think 2MTM would not see the light of day;
* If they are dropping 2MTM and are not playing Aces High, they would maintain Powerslave;
* At least one or two songs of TFF would be played again. IMO, The Talisman and Coming Home
So, as a quick guess, i would see the set somewhat like this:
1. Wicker Man
2. Speed of Light
3. Brave New World
4. The Talisman
5. The Trooper
6. Coming Home
7. Wrathchild
8. The Evil That Man Do
9. Powerslave
10. Hallowed be Thy Name
11. Run to the Hills
12. Fear of the Dark
13. Iron Maiden
14. Bring Your Daughter...to the Slaughter
15. Number of the Beast
16. Wasted Years