This is my thinking too. Even if they agree to it things will come crashing to a halt once Jon returns North and Bran The Buzzkill hits him with that Targ bomb.
If everything is expected to end in a twist, then I too am expecting a twist.
The Nights King is going to finally make it to the wall. His armies would appear to stretch unending as the camera sweeps across. Our heros would look down from the top of the wall in dread, as a lone figure on horseback breaks from the army and moves towards the wall.
"It's him! It's the Night's King!" Jon proclaims, his voice tinged with a slight undercurrent of fear.
The Night King rides forward confidently. Centuries of waiting, planning, and assembling his armies have all led up to this point. He suddenly stops as he effortlessly glides off of his undead mount.
"What's he doing?" asks an off screen extra whose name we'll never know.
The White Walker commander stares up at the wall, where he knows countless eyes are looking down at him with breathless anticipation. With a smirk beginning to spread on his lips, the Night King does an about face, pulls down his pants, and moons the shocked audience that can't fathom what they are witnessing. He proceeds to recover his modesty, climb back on his horse, and with a sly wave towards Jon Snow and his compatriots, returns to his army and retreats back to the frozen wastes beyond. Where he'll wait for the time when man needs to be reminded of what lays beyond.
Just as Roman mothers would for centuries tell their children of the time that Hannibal was at the gates, so to would future Westerosi mothers tell their children of the time when the Night King was at the wall.
That's what I think is going to happen. It's so obvious that they want us to think that the White Walkers are actually trying to breach the wall, so clearly we should be expecting a swerve right? Can't be that straight forward. I see you HBO.
