We have seen so many theories about what's going to happen in season 5. Now a fan has come up with an interesting idea for the final season.
When everything fails and the apocalypse descends, sometimes the only solution is to turn back the clock. We have seen that many superhero franchises have used time travel in some capacity. Now based on some evidence in Season 4, the show’s final season could see Eleven use the power of time travel in the final act but only after Vecna succeeds in destroying the world.
This theory was first shared on TikTok by user weej_lr. In Volume 2 Vecna manages to get inside Nancy Wheeler’s mind. He torments her with memories before showing her a vision of future events. In the vision, she sees see the opening of a massive gate to the Upside Down in Hawkins. But at the very end, we see a clock face with the hands rolling backwards.