also ian's facebook page said they did use it, so i just kinda assumed that they did 2 songs and then disappeared off to the side of the stage, even though that would be a bit weird
From Ian's Facebook:
Setlist Dublin 2015 War of Kings (Live Premiere) Hole in My Pocket (Live Premiere) Prelude Last Look at Eden Scream of Anger Superstitious Second Day (Live Premiere) The Beast Praise You (Live Premiere) Sign of the Times Riches to Rags Firebox Rock the Night Days of Rock 'N' Roll (Live Premiere) The Final Countdown
I posted the setlist there after europemagnum posted it here, and then another user added "Prelude" to the setlist. I'm not sure, but I don't think that user was at the concert, so I think he just assumed that they used "Prelude".