A plot could revolve around Simon being a long - lost relative of Bella's. He shows up in Forks and his presence disrupts Bella's relationship with Edward. Simon has his own secrets about the supernatural world which Bella gradually uncovers, and she has to decide between the two different worlds she's now a part of.
Perhaps Simon is an angel - like being. He is sent to protect Bella from a new threat in Forks that neither the vampires nor the werewolves are aware of. As they spend time together, Bella starts to develop feelings for Simon, which causes a great deal of internal conflict for her as she still has lingering feelings for Edward.
A possible plot for the 'Harry Potter and Bella Swan fanfiction' could be that Bella is actually a long - lost relative of a powerful wizarding family in the Harry Potter universe. When she discovers this, she travels to the wizarding world to learn more about her heritage. There, she meets Harry Potter, who is intrigued by her strange abilities. Together, they embark on a journey to uncover the secrets of her family's past and, in the process, they face challenges from those who don't want the secrets revealed. This journey could involve exploring ancient wizarding ruins, deciphering old spells, and facing off against dark forces.
A plot could revolve around Carlisle and Bella going on a secret mission together. Maybe they have to find a lost ancient vampire artifact that could change the future of the vampire world. Along the way, they develop a deep bond and respect for each other.
One idea could be that Bella, with her experience in the supernatural world from the Twilight series, somehow crosses paths with Chris Halliwell from Charmed. They could team up to fight a new kind of evil that combines the dark magic from the Charmed universe and the vampire - werewolf related threats from Bella's world. For example, a coven of vampires who have learned some dark spells.
A possible plot is that Bella, as a witch and doppelganger, is fated to be a key in a battle between good and evil witches. Her doppelganger form holds a special power that can tip the balance. She has to navigate through her new identity, make friends and enemies among the witch community, and decide which side she truly belongs to.
Another plot could be that Bella Swan has a strange dream about Loki and then discovers she's pregnant. She's confused as she doesn't know how it's possible. Loki, in the meantime, senses a connection to her from afar. He travels to her world to find out more. As they meet, they realize that there's a greater force at work that has brought them together and they must figure out how to deal with the pregnancy and the implications it has for both their worlds.
One plot idea could be that Bella leaves Edward to pursue her own dreams. She realizes that she has lost herself in the relationship and wants to focus on her education or a career. For example, she might go to college far away and meet new friends who help her discover new interests. Another idea is that she leaves because she discovers a dark secret about Edward or the vampire world that she can't accept. Maybe she finds out that vampires have a hidden agenda that endangers humans in a way she didn't expect. A third plot could be that she leaves due to a misunderstanding. Edward does something that she misinterprets as a lack of trust, and in her anger and hurt, she decides to leave to protect her heart.
A possible plot could be Bella and Alice going on a road trip together. During the trip, they encounter various challenges and also bond over shared experiences. They might come across other supernaturals and have to deal with them. Or perhaps Alice has a vision about Bella's life as a human being in danger in a specific location, and they go there to prevent it. Along the way, they learn more about each other's pasts and fears.
One idea could be that Jasper and Bella discover a unique bond that helps them face the challenges in the vampire - human world together. For example, Bella's unique ability to resist vampire powers in the original story could be enhanced when combined with Jasper's gift of manipulating emotions.
One plot idea could be Bella's struggle to adapt to the Mikaelson family's vampire - werewolf drama while also dealing with her own newfound vampire - like powers as part of the family. Another could be her relationship with Klaus. Maybe she tries to temper his more violent tendencies and in the process, they form a unique bond that changes the family dynamics.
One idea could be that they meet in a magical cross - over event. Maybe a spell gone wrong transports Bella to the wizarding world where Lucius discovers her. He's initially intrigued by her unique non - magical yet strong - willed nature.