Stranger Things Season 5 will mark the end of the Duffer brothers' sci-fi horror adventure, closing out a story that's been nine years in the making. Fans have ample theories about Season 5, especially as Vecna seems to have narrowly escaped his demise at the hands of Nancy, Steve, and Robin. Eleven also manages to defeat Vecna's astral form inside the Upside Down, therefore saving Max from sharing the same gnarly fate as her predecessors. Theories for Stranger Things Season 5 seem to range from Will Byer's connection to the Upside Down to the implication that none of the events in this almost decade-long show ever even happened in the first place.