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I think in the end they made it so complicated a couple of seasons ago that they couldn't live up to it, instead they decided to discard the Night King and all the different theories surrounding him and simplified it massively. Greyworm holding Tyrion as prisoner and literally letting him choose the next King and then be appointed Hand to that King is pretty dumb going. He's never accepted any authority but Dany's yet he's happy for all power to suddenly reside in a motley collection of lords who have made the journey down there.

I guess Jon going north makes sense anyway but once the unsullied leave (and presumably the Dothraki) then there's no one left who's going to care about enforcing his exile. I get why Bran was made king but its a bit unsatisfying when they've spent such little time on his character. I do think there's a lot more they could have done with him but they never bothered. Also don't see why the other lords would see Bran allow the north to be an independent kingdom and not demand the same for themselves. Realistically anyone could easily challenge Bran to the throne but I guess that doesn't matter now as its supposed to be 'the end'