I always thought the night king was building an army to destroy mankind, because that's what he was invented to do by the children of the forest. Maybe he simply still has this programming to kill all humans to protect the children.
When I was thinking of how I would have done the ending, I thought that the Spiral sign the Walker's make could have been the family sigil of the guy who got turned into the Night King by the Forest Children. Like it was the one thing he still had some memory of from his time as a human. Someone could have figured that out, like Sam when reading all the old books, and then used that to their advantage somehow.
This was awesome. It actually makes perfect sense. "The prince that was promised." The others are owed something or someone. Mankind forgot its part of a pact. @23:00 "This world already has precedent for inter-species treaties." And for treaties between families. Theon was given as a ward to the Starks as part of a treaty. That kind of agreement was nothing new. It actually went back thousands of years. The Night King had little interest in Brendan Rivers as the Three-Eyed Raven. He might be after Brann because he is both the Three-Eyed Raven and a Stark, and that is something that was promised to The Others. I think Theon being a ward of the Starks as part of a treaty was a definite means of foreshadowing this.
Edit: ...AND.. "There must always be a Stark at Winterfell." This could be because the Lord of Winterfell knows the terms of the agreement. Lord Rickard Stark was burned alive in King's Landing by the Mad King. He may have known the terms of the agreement but was killed before he could pass them on. He may have even already informed his son and heir Brandon Stark of the terms, however, Brandon died at the same time that his father did in King's Landing, choking to death trying to rescue his father. Brandon was 20 years old at the time of his death so he may very well have been told the details. That's when Ned became the Lord of Winterfell, something no one ever expected to happen. Ned becoming Lord of Winterfell was entirely unforeseen. In fact, Catelyn had been promised to Brandon as a wife and after he was killed, she was wed to Ned by default. So if there was some type of agreement and that's why there had to always be a Stark in Winterfell, then those secrets died with Rickard and Brandon. That was in 282 A.C. The story starts in 298 A.C. Ned has been Lord of Winterfell approximately 16 years at the start of the series. So if there is some type of agreement, and there's a part of it the stars are supposed to hold up, that has been ignored for 16 years by the time the story kicks off.
Another edit: I almost wish I hadn't watched this video. I'm going to be up all night going through this stuff now. You opened a real can of worms here, pal. My OCD hasn't kicked in like this since I was a guitar playing teenager and I would lock myself away for months every time a new Van Halen album came out, obsessively learning every note.
Excellent work. After watching Season 1, I read the entire series in about a month. It was addition. Once the show got past the books, the show runners lost their way. In the book, Catelyn Stark survived the Red Wedding. That story was completely cut out. If the show runners had taken 16 shows to wrap up the story instead of six, GOT fans would have been much happier; both readers and watchers. GRRM has been painted into a corner by the show runners. I don’t think we will ever have a completed series.
It could also bee that the Father and Eldest son held the Stark secret. If it had passed to within the current time, with the deaths of Rickard and Brandon and Benjen going missing that knowledge could have been lost. Also the tradition of a Stark going to the wall could be so that this knowledge would be held relatively safe.
One of the walls protections was “there must always be a Stark in Winterfell”. This maintained the spells protecting the wall and protecting Winterfell. Brynden Rivers accidentally caused that spell to break when he drove Aery’s mad trying to warn him of Aegon’s prophesy. He was warned, & Rhaegar became obsessed with the prophesy, so that was good, but Brynden (3 eyed raven) drove Aery’s mad, when attempting to show him the walkers, drove him mad much like Bran did to Hodor, accidentally causing the fall of the Targaryen’s. And accidentally causing the spell to be broken. At the time spell was broken, Ned was in the care of Lord Arryn, Brandon was captive in King’s landing, and Aery’s demanded that Lord Stark come to face justice for Brandon’s threats on Rhaegar. Lord Stark obeyed, and left Winterfell, for the first time, there was no Stark in winterfell, and the White walkers began to wake up. What was Aery’s seeing in his mind when he repeated “burn them all!” Over and over and over again? Was he seeing the rebellion, or was he seeing the walkers rising in the far north?