Well, they could go on a trip around the world to gather ancient artifacts that have the power to either strengthen or destroy the vampire - werewolf peace in Forks. This would involve lots of action, mystery, and interactions with different characters from the Twilight world.
One interesting plot idea could be exploring how different characters adapt to the post - apocalyptic world in new and unexpected ways. For example, a character who was once a timid office worker becomes a fearless scavenger.
Well, they could go on a field trip to a scientific research facility that is secretly working on a dangerous experiment. The Avengers then have to stop the experiment from going wrong. Or perhaps it's a field trip to a magical realm. Thor could guide them through the strange new world filled with magical creatures and powerful spells. They might also go on a field trip to an alien planet, learning about different cultures and technologies there.
Well, perhaps on this field trip in the fanfiction, Peter stumbles upon a mystery related to the place they're visiting. It could be something like a series of strange symbols that he starts to decipher. Or, what if the field trip is to a scientific research facility and Peter accidentally gets exposed to some kind of experimental substance that gives him a temporary superpower? Also, Peter could meet a long - lost relative at the field trip destination who reveals a big family secret.
An old werewolf who has decided to retire from the pack life and goes on a trip to all the places that were important to the werewolves in the Twilight story. Along the way, they might run into some vampires and have to face old prejudices and form new alliances.
A plot could involve a new vampire in the Twilight universe who is ashamed of their transformation and uses a mask to try and fit into human society again. They struggle with their new instincts while trying to keep their identity a secret. Along the way, they meet other characters from the Twilight series and their story unfolds in a way that challenges the norms of the original story.
One idea could be a new vampire character being reborn in the Twilight universe with a special power, like the ability to control the weather. This would create a whole new dynamic as they interact with the Cullens and other vampires.
One idea could be exploring a new magical creature in the Twilight universe. For example, a magical being that can control time and how it affects the relationships between vampires, werewolves and humans. Another plot could involve a character from the Twilight world getting lost in a different magical realm and having to find their way back, all while facing new and strange challenges.
One plot idea could be a hockey player who discovers he has a special power during a twilight game, like being able to skate at super - speed. Another could be a love story between a hockey fan and a player, set against the backdrop of twilight - filled evenings at the rink. Maybe a story about a hockey team's struggle during the twilight of their careers, with an old - timer coming out of retirement to save the day.
One idea could be exploring the origin of the psychic powers in the twilight world. Maybe there was an ancient event that triggered it.
A fanfiction could explore the idea of a character from Twilight becoming a Shadowhunter. For example, Bella could discover she has Shadowhunter blood and has to leave the vampire - werewolf drama behind to learn a whole new set of skills and rules in the Shadowhunter world. It would be interesting to see how she adapts and how her relationships with Edward and Jacob change as a result.