A fascinating theory suggests that The Winchesters, the upcoming Supernatural spinoff, takes place in an alternate universe introduced in the final season. Glaring canon issues exist between the two shows, including John Winchester's ignorance of paranormal threats until Mary's death in Supernatural versus him hunting supernatural beings in his late teens in The Winchesters. Evidence hints at a parallel universe setting with the presence of universe-hopping monsters and an interdimensional vacuum box. Jensen Ackles' role as investigating how his parents met could be explained by him observing their lives in different universes.
