Details about the final season are being kept tightly under wraps, but the Duffer brothers know where the show is heading. "Once we actually really sit down and write down that final season anything could change," Ross told SFX Magazine. Matt added, "But I doubt the ending ending is going to change . . . It's conceivable that it changes but I think it's unlikely because it's one of those endings that just feels, and always felt, right, and it also feel sort of inevitable." And per Variety, Will's journey will be a major part of the final season.
The ending of season four also gave us some major clues about where the plot will go in the final season. In the season finale, the gang subdues Vecna, but, as Will tells them, he's not dead. And he was successful in opening up four gates between Hawkins and the Upside Down, which causes a giant crack that let the Upside Down flood into the town. How our protagonists will save the day remains a mystery.