I think Arya will die in the end. She is too consumed with vengeance. I don't think we've seen the last of Jaqen H'ghar.
I like Nick's thinking about the Sansa/Jon dynamic. Sansa knows about the Lannisters, Littlefinger (or simply the South) and Jon knows the North and beyond. I think they need to learn to become a team. In the end, I don't feel as though the Starks care about the Iron Throne, but wanting their "kingdom" back in the North. Of course, Dany may see it differently since they sided with the Baratheons against the Targaryans (could Jon's speech about forgiving the children for their father's errors be foreshadowing?) Plus how with the Jon/Dany relationship unfold once it's revealed to Dany of his lineage?
I wonder if Tyrion's vision will be played out in the show... how he kills his father a second time and as well as Jamie?