Board Thread:Anime/@comment-5774380-20190630165114/@comment-24407809-20190702193148

At the very latest, I'd say that the series will end in June of next year (which would mean 3 more volumes/12 more chapters to wrap everything up). Unless the next season is being animated by Wit who (as we know) have a tendency to start working on episodes very late in the game. I remember that Wit was apparently finishing up animation for some episodes of season one the day that the episode was supposed to air, and if they did that with this season, then I could potentially see the manga lasting until October of next year.

Basically, we know that the season is going to air in the Fall, and Fall anime usually begin airing in October. If AOT's final chapter comes out in Ocotber, Wit probably wouldn't have any trouble adapting the events of that chapter (and the final arc in general) despite how close the chapter's publication would be to its episode adaptation's air date. So I think it's feasible, depending on the anime studio, for the manga to go that late in the year no matter when in the fall season the anime begins airing.