Some theories about the rest of "Game of Thrones" Season Six

Now that David Benioff and D.B. Weiss have publicly announced a general timeline for the end of Game of Thrones - two shortened seasons after the current sixth season, totaling about 13 episodes - it's time to get speculating. Over halfway through season six, the pieces of the endgame are starting to move into place, and as a result I'm feeling pretty confident about the following prediction for the final four episodes of this season, and the series overall. (SPOILER WARNING, obviously.)