It seems to me that the final season will be a little padded. For the overall plot, we'll see that it was Bran who drove the Mad King mad, like Hodor, so he'd burn them all, all the zombies, that is. And when Bran stayed too long in the past he couldn't return to the present and was trapped in the body of the man who was called the Three-Eyed Raven, grown into a tree (or vice versa.) So there was never anybody else but Bran and he set himself up to be marked by the Night King etc. If we don't see this, I'm calling it cheating on the foreshadowing. The present day body of Bran will presumably die, mentally if not physically, so that will be kind of sad. Also, everybody with Valyrian steel will be involved in a key battle.
Much of the plot has been about the parentage of Jon Snow. I've never quite understood why it mattered (and I rather like Jon Snow, sue me.) The only things I can think of is, either it's a way to confuse the Night King on who the prince that was promised is, so the bad guy's evil plan to take out his enemy misses the correct target. Or it's because it forces Jon Snow to kill Daenerys. Even if it's not Jon Snow who murders Daenerys, she will probably perish in one form or another, because the show hates her. Like Cersei and the Iron Bank, they don't like revolutionaries.
Cersei will also die to preserve the official morality that incestuous sluts die for it, but the show loves her, so they will no doubt build this up into a bittersweet moment, especially if they have her kill Jaime for betraying her, and Tyrion takes yet more revenge. Or possibly she suddenly transforms into noble and self-sacrificing and sets off the wildfire with herself as bait, because only this will satisfy the producers' passion for her.
Varys, who has already started working against Daenerys is also loved by the show, so the show will probably show him being burnt to justify hating Daenerys, treating him as a martyr to democracy or something equally preposterous.
The thing about Varys is that he along with Littlefinger and Olenna were responsible for almost all of the bad stuff happening. It was almost certainly Varys who told the others about Jon Arryn searching for heirs. And it was almost certainly Varys who told Littlefinger about what Bran was doing when he was pushed. If you want to go way back, it was almost certainly Varys who found the dragon eggs and passed them on to be given to Daenerys. I've imagined that demon voice he heard when he was castrated told him where they were. If there's just a few dragons, then one could be snared but the few survivors couldn't burn the corpse, hence the long, long, long, long, long wait before the Night King makes a move.
The show loves Tyrion who will probably be Gendry's Hand. Sansa will be queen. Arya by all rights should become the Faceless God's missionary priestess in Westeros, otherwise her whole arc is rather overblown.
Jon Snow will likely go back to dead once his mission is done, also the bittersweet.
But, the prophecy about sunset in the east and seas withdrawing and mountains dancing before Daenerys will have a child suggests that Sunstone Island is a Chekhov's volcano. After it erupts, her and Drogo's son may come back from the dead to fight the Night King. Then as per the vision where Drogo talks about waiting for her they all ride into the night lands together.
Seems like of all the Great Houses Stark's riding pretty high.
