If this was listed as just the GoT, I would probably buy it to complete my set (MM CoK + All SP), even though it doesn't match.
But knowing that buying it alone will also break the 196 pairing seems really rude. And there's no way I'm ponying up that much for the MM CoK 196 that is listed. Has any user here ever claimed 196 ownership of any other title?
If you don't sell within a month or so, make sure you order the matching number for Subpress Game of Thrones before the exclusive preorder period passes.
To avoid the hassle of having to ship that book separately, I would say you should hold off on making that preorder for a while, because once you do, it seems like the established rule is that you can't change who the preorder gets shipped to.