Euron needs a gift for the Queen, and more importantly, he needs credentials as a potent dramatic device. My first instinct was that he would nab Tyrion, but that would be hard to work and premature for the story arc, and no sensible animal would take on the three dragons this early in the season. No, he's off to Dorne to be cruel to women, bringing back those guilty of killing Cersei's daughter.
Likewise, if Jaime could conquer the high castle with Crazy Mom and Spectrum-Disorder Boy, then two of their enemies are killed. Less salary, fewer characters. Always good when your money machine is nearing its last days.
Little Arya looked awfully sweet, eating rabbit and shopping for good manly faces. (But I wish they had a little more budget to show the full transformation of a body when the face goes on, and off. Walter F. was much bigger than her, and she doesn't dress in old-man hands either.)
I have no good idea how to bring Bran and his ultimate knowledge into the story line. The boy can go everywhere and everywhen, which makes him into the ultimate Google Photos app. A ten minute monologue could pretty much put everyone in their place. So yeah, I think he's intriguing, but a far more dangerous weapon than dragons for the writers to deploy.
The Targaryen of the North meets the Targaryen with dragons. A thousand years of waiting for that moment may be surprised by the outcome. Which won't be love, I suspect.
Cersei talks of a thousand-year dynasty for her and her brother. I think we should take her at her word. She has a very competent physician on staff who can animate poisoned, mostly dead warriors. Why not make the twins immortal? Because that would be the final push that would make Jaime kill her?
Who are Targaryen's themselves, I suspect.
The Ice King has to become more compelling than a blizzard with spears. He needs a voice and a culture and the purest of agendas. If he is to become a suitable nemesis for the final season.
Daenerys won't win, but that's why we spent so much time at Slaver's Bay. That's where she should rule out her lifetime.
Jon won't win. He's too good/weak to be the king, and he doesn't have the hunger, and besides, he's fighting the more important war in the north. If he survives, he'll live out his days doing infrastructure work on the Wall.
The Hound kills the Ice King.
Jamie sits on the throne.
No, Tyrion is at Dragon Bay. Littlefinger sits on the revamped throne. Although he should be on Arya's list. Which, by the way, Bran's time-tripping could point that girl at a lot of worthy targets.
So who rules?
Unless of course the unthinkable happens. An election with a Prime Minister named Lord Varys.