The Night's King Is Very Likely Heading South
Halfway through the season, we speculated that Bran may accidentally allow the White Walkers South of the Wall, and David Benioff teased to Deadline that the Night King may indeed push past the Wall: "The Wall isn't just a physical structure keeping the army of the dead out. If the Wildlings managed to make it over, which they have, and the Night King has so much more in the way of both power and troops who'll do literally anything he says . . . we'll keep it at that for now."