It's OK for a bit of fun to post our expectations about ATG on the setlist, but every Maiden fan knows that's never gonna happen. Simply, they won't play songs they've never played live before.Simply put, no Alexander the Great because Harris and Dickinson don't like it, no some other SiT stuff because someone else in the band might think its meh.
My opinion about ATG is that Harris maybe feels cringe (I think I got the right expression in English) because of the last verse. Paving the way for Christianity and army that wouldn't follow him to India...