The show left the books behind a while ago.
Technically, in the books, Stannis is still alive. Tyrion is a newly freed slave but hasn’t met Dany yet. Dany is in the grasslands facing the kalasaar with her dragon having gotten married and barely survived a coup (the other two dragons freed themselves and are living wild and terrorizing Mereen). Barristan the bold led a count-coup and imprisoned Dany’s husband. Jamie never went to Dorne, and Myrcella is alive (missing an ear) and Dorne is leading a revolt against Westeros with Myrcella as the true heir to the Iron throne as she’s older than Tommen. What else? Yara is called Asha, and she’s so much better in the books! There a shitload more Ironborn pirating in the books. Also another uncle thats just missing totally in the show. Also more contenders to the iron throne, more Targaryans. I mean I do get that they had to cut it down because holy shit there are so many characters in these books, but its been a little shocking what the show runners have cut. (Tywin’s brother, current hand of the king, was a huge character and according to GRRM actually important to future plot development but he’s been largely ignored by the show.)
Also, has the show ever used the phrase “the dragon has three heads” - because that’s really big in the book, and a lotta speculation on who the three heads are!
So this season, for us book readers has been “Oh, ok, well I guess that plot line/character is unimportant…” everytime they kill someone. Its been shocking to say the least.
So… I think John could marry Sansa. Once Bran tells them who Jon really is. He’s as related to both Sansa and Dany. His parents are their aunt/brother. He’s cousin/nephew to Sansa/Dany. He could marry either really… but yeah, he’ll probably marry Dany. /sigh - poor Sansa. Tho… if Tyrion returns… he could reclaim her as his wife no? They were married… before Bolton… SO MUCH MARRIAGE DRAMA!
Arya. In the book Arya is still in the house of black and white. So that was fun to watch. Also gross. No one liked toe-pie! And there’s still lots of people on her list! (Someone needs to update that!)