"To you, in 2000 years" is the name of the plot episode. At the time, we didn't even pay attention to that title, because it made no sense. But after all these years, we finally understand. Isiyama, you are a goddamn genius! Please look at the 1st scene of the anime: Eren wakes from a dream. He has seen the future through a dream. NOW in season 4, we know HOW & WHY. He asks mikasa "Why is your hair long?" NOW in season 4, we know WHY. Pay attention to the dream sequence. The 1ST SCENE OF THE FIRST EPSIODE HAD MORE CONTEXT THAN AN WHOLE NORMAL SHOW WOULD HAVE. Go search the net: What does "to you in 2000 years" title name mean? And if you are a manga reader, remember chapter 1of year 2010 and then remember the chapter 120 in last year, 2019. All I can say is... AOT is a GODDAMN MASTERPIECE. AND WE ARE LUCKY TO HAVE SEEN THE CLASSIC OF THE MODERN AGE BEING MADE. Not only anime, easily one of the deepest plots in any written fiction