We have confirmation from Bran that the army of the dead are heading to Eastwatch By the Sea, the Hound also saw this in his vision and this is where him and the Brotherhood have been heading for a couple of episodes, and is also were Jon sent Tormund and the Wildlings. The episode is also called Eastwatch, meaning that we're very likely to get our first battle of the season with the white walkers. Really don't expect any of the characters present to make it out of that alive tbh.