I think there's going to be like a Top 7 vs. Top 7 duel for the fate of the world.
They spent an inordinate amount of time bringing all the best swordsman in the 7 Kingdoms to Winterfell (Brienne, Jorah, One-Handed Jamie/Bronn, Arya, Giantsbane, Hound) and equipped most of them with Valyrian Steel. Plus, haven't most of the bigger characters offered to fight or ended up defeating their greatest adversary in single combat?
Dany/Jon on a Dragon vs. NK on a Dragon (which means one of Dany or Jon is going to die in Episode 3 in my opinion). I think Lightbringer will have to play a part here so either Dany's or Jon's death won't be deemed useless. Or fuck. It's Jamie killing Cersei.
Sansa is definitely ending up as the Hand of the King/Queen. Irony is too thick. She's the only person that's been around the three smartest people on the show - Baelish, Cersei, and her husband Tyrion.
I think the crypt will actually end up saving them. The magic of winterfell will save them justtt when everything seems lost. And it's in Lyanna's tomb. Stoneheart/Ned (the two best parents in the 7 kingdoms) will have to make one last appearance.
Easily, and I mean easily, GOT is the best show ever. And I think that's a combination of HBO knowing full well how to step back and grant their show makers full autonomy and GRRM putting together a so well inter-twined story that literally fucking slaps you in the face with irony when its revealed. Everything is a fucking goddamn plot point in this show.
Those fucking wolves are going to come back. Maybe with Stoneheart?