Remember, it might very well be bit of a trolling. I remain very doubtful when it comes to any SiT stuff, let alone anything specifically Somehwhere in Time centred for next year, besides a couple of potential setlist picks; namely Wasted Years (maybe HCW, but I doubt it) and Stranger in a Strange Land, and well... Alexander, as much as I still doubt it's going to be played, haha.
However, I can see the possibility of the next tour being branded as something like "The Time Machine" or whatever, which justifies proper Senjutsu coverage and offers leverage to include a good doze of classics, including a handful of rarities too, with 1-2 cuts from the past three decades. Given how TBOS and LOTB tours have given quite an extensive coverage for the TNOTB, POM and Powerslave stuff, I think it's still very plausible that one or two interesting Somewhere in Time and/or Seventh Son cuts will make it to the set as the usual "surprises" we have, to be fair, gotten in almost every set.
Altogether ... I wouldn't hold my breath, but you know, with LOTB already being free from the History of Maiden brand and messing up a few years of their pre-planning for these years, we can definitely see the album tour/hits tour cycle being... not broken, you know, but blending together through something... not exactly like, but something like the thematic & stage set sequences of the LOTB show.