The setlist will be the same except they will replace your favorite song with Wrathchild.
That is a really good point actually. Last time that happened was between 2012-2013 and that was because the 2012 tour was USA only. As I said before, they will probably change 3-4 classics for next year (COTD, Powerslave, BB, WY).It's very, very rare that Iron Maiden has a half year gap in a tour and comes back to play the same songs.
The Classic Wrathchild Tour
Wrathchild
Wrathchild extended
Wrathchild without the screaming
Wrathchild with Harry's vocals
Wrathchild with Gers on the backing vocals
Wrathchild commented by Harry
Wrathchild: a re-release by Dave Murray
Wrathchild with DiAnno on Skype
Wrathchild with Bruce on the drums
Fear of the Dark
Iron Maiden
--
Wrathchild instrumental
Wrathchild

True. But I have a feeling it might happen this time, just like 2012 and 2013. They'll hit markets they didn't cover this year. Including UK arena tour. And it wouldn't be fair for them to not get the 2016 setlist.It's very, very rare that Iron Maiden has a half year gap in a tour and comes back to play the same songs.
The scenario I hope for: March-July the US/UK/Europe tour in that order. September they enter studio (like they did for TBOS). New album is released at the end of February 2018.

I don't see them entering the studio right after a quite extensive tour, with just a month off. Plus apparently reliable sources say that Harry is going to record a new album with BL. It is not specified wether it will be before or after the next Maiden record, but my guess goes to the former (but it could also be between Maiden's tours).The scenario I hope for: March-July the US/UK/Europe tour in that order. September they enter studio (like they did for TBOS). New album is released at the end of February 2018.