2. CHARACTER WRITTEN OUT
In Season 2 we are introduced to the character of Jo Harvelle, daughter of Ellen Harvelle, a family friend of John and Bobby. While she is not as skilled as the Winchesters, but she aspires to be a hunter like her late father. She harbors romantic feelings for Dean who also reciprocates but doesn’t act on them out of fear of losing Jo forever. In Season 5, Jo along with her mother joins the Winchesters to eliminate Lucifer. However, the hellhounds mortally wound Jo, she decides to sacrifice herself to take down the hellhounds. Her mother also joins her and they both die in an explosion eliminating the hellhounds. While the character of Jo had so much potential, it was eventually written off. She did return in Season 7 making a cameo appearance. Eric Kripke revealed that her character was created to present a mother-daughter dynamic similar to a father-son relationship which was a highlight of Season 1.
The actress Alona Tal auditioned for the role of Jo as she was a fan of the show. The character was written as an innocent girl next door who is trying to be a hunter. Kripke regretted characterizing her this way. There could have been a romantic relationship between Dean and Jo, but the idea was dropped because of Jo being this innocent girl which would be contrasting to Dean who is attracted to danger. The character looked like the ’14-year-old’ sister of Dean. Ultimately, her character was written off in Season 5.
Supernatural aired on CW which is the home of numerous DC Superhero shows which are set in the Arrowverse. Supernatural had a crossover with Legends of Tomorrow. And Supernatural is a show which exists in the Arrowverse, the characters stumble upon the sets where the show is filmed and the Winchesters are mentioned. We see the Baby in the episode with its trunk full of weapons (props). There is even a reference to the glowing amulet of Dean. As good as the crossover was, there was once a possibility of Supernatural crossing over with The Vampire Diaries which had started airing in 2009 on CW. Team Supernatural approached the creators of TVD who politely turned down the proposal as they were not ready back then. Julie Plec revealed in an interview that looking back it was a missed opportunity.