Too much breath wasted this far-fetched NK=Bran theory:
https://decider.com/2017/08/31/the-b...eories-so-far/Actor Isaac Hempstead-Wright poo-poo-ed this theory in an interview with Vulture, saying:
"I think it’s less that they’re the same person and more that they’re two of the ancient beings of Westeros. The Three-Eyed Raven has been around for God knows how long, and White Walkers have been reported since the beginning of time. As we’ve seen, they were created by the Children of the Forest, so we can’t get much more ancient than that. Perhaps we can think of it as these are two characters with a huge amount of power, but one is a Frankenstein’s monster who is driven by nothing but hatred and violence. Then there’s Bran, who uses his powers for good. I want to find out why the Night King is so obsessed with destroying mankind. We’ll see whether they have any kind of explanations in the next season. Hopefully we’ll find out cool stuff about both of those characters."
The article has an interesting theory that it'd be fitting if the Kingslayer (Jaime), not Jon or anyone else, kills the Night King with his valyrian steel sword. Night Kingslayer?