Brian Earl Spilner said:
If he goes to the Citadel, I called it.
Calling my shot: with the forces at WF distracted, the NK goes to the Iron Islands. He kills everyone shortly after Yara takes them back and destroys the ships that could potentially be used to ferry the survivors from WF to the islands. He then flies to Essos and lays waste to everything. He keeps flying east to Asshai so that we finally get to see what that place is like.
While there, he learns magic that allows him to reconnect Dorne to Essos via land bridge. He uses said bridge to bring his new Essos army back to Westeros. He then conquers Westeros from south to north and arrives at the Neck just in time to meet the survivors of WF with his new army of 20,000,000 (because why go to WF first when there are others available, right?).
Unfortunately for him, the NK failed to check his right flank or else he would have seen Robin Arryn with a quiver full of new dragonglass arrows. Robin nails that sucker in the right eye and the army of the dead collapses. The day seems won for the living, but the presence of 20,000,000 corpses results in a plague that wipes out those that are left.
Fast forward 1000 years. The natural world has reclaimed the cities of men. Weirwoods are again found in abundance. We zoom in on the face of one, and Sean Bean's voice says "we must prevent the patriarchy from destroying our world as well."
Forum 16 explodes.