We're nearing the five-year anniversary of Supernatural's series finale, which capped off the show's 15-season run. Though the series ran for a whole, there were still plenty of storylines that could have and should have happened. One of those storylines I wish happened was a crossover with The Vampire Diaries, something that had been discussed in the past by both shows' creative teams. However, TVD co-creator Julie Plec shared her reason for turning it down, and I understand it.
