The better half has theorised that there’s going to be a clash of religions which may, or may not, be based around the Starks.
Basically Arya has become an assassin, trained by the Many Faced God. While she may not technically be practising, there’s an obvious link there.
Bran is the 3-eyed raven, so tied up very tight with the Old Gods (the seven?)
The Lord of Light is being used to keep the peace by Dany darn sarf and his priestesses are a cunning bunch; I’d be reluctant to write Melisandre off just yet even if she is a little downhearted and heading to Volantis. Not sure about a Stark connection here, but her and Jon have history and it wouldn’t take a lot to introduce her to Sensa.