In some fanfiction, there might be a plot where Edward and Bella travel to different parts of the world to learn more about vampire and human history related to their kind. This gives them new adventures and a deeper understanding of each other. They could visit ancient vampire clans in Europe or discover hidden human communities that know about vampires.
One interesting plot could be where Edward and Bella face a new supernatural threat together that tests their relationship in ways not shown in the original story. For example, a new type of vampire with unique powers arrives in Forks.
One interesting plot could be where Edward and Bella face a new kind of vampire threat together. They have to use their unique bond as mates to overcome it. For example, a group of vampires with special powers that can disrupt their mental connection.
A third plot could be about their journey of self - discovery within the relationship. Bella might learn more about her own powers or abilities because of Irina. And Irina could become more in touch with her emotions through Bella, leading to a deeper and more meaningful relationship.
One interesting plot could be that Klaus and Bella meet in a mysterious forest. They initially clash due to their different natures but gradually find a connection. Another plot might involve Bella having some special power that Klaus is intrigued by and he tries to figure it out while falling in love with her.
One interesting plot could be their journey of understanding each other's powers. For example, if Jane has her unique vampire abilities and Bella has her own set of skills or traits, they might have to figure out how to combine or work with them. Another plot could be them facing challenges from the vampire coven. Maybe some members don't approve of their bond and they have to fight for their relationship.
Some fanfictions might have a plot where Bella and Stefan try to integrate their lives. Since they come from different fictional universes (Twilight and The Vampire Diaries), they could face difficulties in getting along with each other's friends and families. There could be a lot of drama as Bella tries to understand Stefan's past with Katherine and other vampires, and Stefan tries to understand Bella's connection with Edward. This exploration of their relationship in the context of their complex pasts can make for a really engaging plot.
One interesting plot could be that Bella discovers a hidden connection with Eleazar that goes beyond her relationship with the Cullens. Maybe she finds out they have a shared power or a special destiny together.
Another plot might involve an external threat to the royal family that Edward and Bella have to face together. Maybe a neighboring kingdom is planning an attack or there is a magical threat that only their combined powers (if they have any in the fanfiction) can overcome. This would test their relationship as they fight for the safety of their kingdom and each other.
Another plot could be that there's some sort of mystery or danger at the prom. Maybe a rival vampire group shows up, and Edward has to protect Bella while still trying to make their prom night special. They might have to dance and be romantic in between fending off attacks.
One interesting plot could be the child having special powers inherited from both Edward and Bella. For example, the child might have the ability to read minds like Edward and also possess Bella's strong will. Another plot could be the child's struggle to fit in with both the vampire and human worlds. Maybe they face challenges at school because they are different from the other kids.
One possible plot could be that Edward returns to Bella after a long self - discovery journey. He realizes that his love for her is unwavering. Another might be that he comes back to protect Bella from a new and dangerous threat in Forks.