Perhaps a story where Dean Winchester and Elena Gilbert are both brought to an alternate dimension by a powerful sorcerer. In this dimension, they are the only ones who can stop a dark force from taking over all the realms. They have to rely on each other's skills. Dean with his hunting expertise and Elena with her knowledge of vampires and the supernatural in her own world. As they face challenges, their relationship deepens from comrades to something more romantic.
One idea could be that Dean and Elena meet when Dean is on a hunt in Mystic Falls. They initially clash because of their different approaches to dealing with the supernatural, but then they realize they can learn a lot from each other. Another plot could involve them teaming up to fight a common enemy that is a threat to both the world of Supernatural and The Vampire Diaries. For example, a powerful demon - vampire hybrid.
One idea could be exploring how the reborn character uses their knowledge of the show's events to prevent some of the tragedies that befell Elena. For example, they could try to stop the initial vampire attacks on Mystic Falls. Another plot could involve the reborn character trying to change Elena's relationships, like making sure she doesn't fall for Stefan right away and instead encourages her to explore other options. Maybe they also introduce new supernatural elements to the story that weren't in the original show, which could lead to new alliances and conflicts in Mystic Falls.
It really depends on the writer's interpretation. Dean is used to being in charge and making quick decisions in dangerous situations. But Elena has been through a lot in Mystic Falls and has grown to be a strong leader herself. In some fanfictions, Dean might be more dominant because of his experience with a wider range of supernatural threats. However, Elena could also be dominant when it comes to matters related to the vampire world she knows so well.
One idea could be that the little sister discovers she has a unique power that no one else in the family has. Maybe she can communicate with spirits in a different way than Bonnie. Another could be that she gets involved in a love triangle with one of the vampire characters and a human from school.
One idea could be a crossover where the magical world of Severus Snape and the hunting world of Dean Winchester collide. For example, Dean could end up in Hogwarts and Severus has to deal with this strange, non - magical yet very capable hunter in his midst.
Well, a great plot could be that Elena discovers she's pregnant and it sets off a chain of events that forces her to re - evaluate her relationships. She might have to lean on friends like Bonnie and Caroline more than ever. And as for the pregnancy itself, there could be some sort of mystery about the baby having special powers or a unique connection to the supernatural elements around her.
One plot idea could be that Dean, as a girl, has to deal with the different ways people treat her in the hunting world. Maybe some monsters underestimate her at first, but she quickly shows them she's still as tough as ever. Another idea is that she has to navigate her relationships with Sam and Castiel in a new way, especially any potential romantic feelings that might change or emerge because of her new form.
One plot idea could be that Dean Winchester somehow gets transported into the wizarding world. He might team up with Harry Potter to hunt down a dark wizard who is using dark magic to summon demons. Dean's knowledge of the supernatural from his own world would be a great asset, and Harry could introduce him to the magic of spells and potions.
Perhaps a plot where Dean is pregnant and barefoot in a post - apocalyptic world. He has to survive not only for himself but also for the baby. His skills as a hunter are put to the test in a different way as he has to find food and shelter suitable for his condition. He might also face challenges from other survivors who either want to harm him or take advantage of his situation.
A really interesting plot could be that Elena and Mateo get transported to a different realm. In this realm, their powers work differently and they have to learn how to adapt and work together to find a way back home. They meet new allies and enemies in this strange new world and their relationship deepens as they rely on each other for survival.
A third plot might be Elena getting stuck in Klaus' past through some magical mishap. She has to navigate his old world, meet his family when they were still alive, and in the process, she and Klaus grow closer as they face the challenges of that time together.