Well, one interesting plot could be them having to work together to face a common enemy despite their differences. Maybe there's a new vampire or werewolf threat that forces them to put aside their rivalry.
One interesting plot could be that Bella discovers she has a special power that can end the fight between Edward and Jacob. For example, she can somehow make them see that their fighting is pointless and they should respect her choice instead of fighting over her.
Jacob is often depicted as being more in tune with nature, being part of a werewolf pack. He is strong, loyal, and has a fierce protectiveness. Edward, on the other hand, is a vampire with his own set of powers. He is intelligent, brooding, and has a deep sense of loyalty to his vampire family. In this fanfiction, their interactions and relationship are central to the story.
One interesting Bella, Edward, and Jacob fanfiction could be about an alternate universe where Bella has to choose between Edward and Jacob based on their different abilities to save the town from a new supernatural threat. In this story, Bella might discover a power within herself that changes the dynamics of the love triangle.
Some fanfictions might explore what happens if the imprinted person has her own feelings for someone else before the imprinting occurs. This could lead to a love triangle where the person is torn between her initial feelings and the strong bond of the imprinting with either Edward or Jacob. There could be a lot of internal conflict and emotional turmoil for all the characters involved.
There are fanfictions where Edward, Bella and Jacob are sent to an alternate reality. In this new reality, their relationships are completely different. Bella might be a powerful vampire herself, and she has to navigate her feelings for both Edward and Jacob in this new context. It's a fresh take on their love triangle.
One plot idea could be that Jacob and Edward have to team up to protect their shared territory from a new threat. They start off distrusting each other but as they face challenges, they learn to respect and rely on one another.
One possible plot could be the challenges they face in their relationship due to the unexpected pregnancy. For example, how they deal with the reactions from their families and friends in the Twilight universe. Another plot might involve the preparations for the new life, like finding a safe place to stay.
One possible plot could be how Jacob and Bella deal with the reactions of their families and friends. Maybe some are supportive while others are shocked.
A possible plot is that Renesmee gets into trouble with some vampires who don't trust her because of her unique nature. Jacob steps in and tries to make peace between them. He uses his relationship with Renesmee and his standing among the Quileute to negotiate a truce, all while their bond grows stronger in the face of the conflict.
One interesting plot could be how Jacob's imprinting changes the dynamic between him and Bella in ways that are different from the original story. For example, he might be more protective and it could lead to some new adventures where he uses his wolf abilities to safeguard Bella from new threats.