Yara returning to the Iron Islands
Seems she's going back to prep them in case Daenerys needs to hide out there.
Made me think of something. I'm not saying I think this *will* be the ending, but what would be a creepy ending. If those who survive to indeed flee to the Iron Islands to hide, and try to wait out the winter. As they're there, their resources slowly dwindle, and in the distance on the shore, they see the Army of the Dead slowly amassing, growing ever larger, watching them. As winter drags on, there's an ice shelf slowly creeping toward them, which the Dead know they can use.