Perhaps the future holds a time when the Cullens' secret of being "vegetarian" vampires is out and they are either revered or despised for it. This could completely change their standing in the vampire world and how they interact with others in the future. They might have to fight for their way of life all over again.
Well, they might face some new and advanced vampires. Maybe the future vampires have developed different powers or abilities that the Cullens have never seen before.
One of the most exciting plot twists could be the return of a long - thought - dead character with new powers. Maybe a villain from the past comes back stronger and with a different motive, like Orochimaru returning with a new form of immortality technique. Another could be Naruto suddenly losing his powers and having to find a new way to fight, which would completely change the dynamics of the story.
Well, in some fanfictions, there might be a plot twist where the future that is being watched is actually an alternate and false future created by a powerful villain. This would completely change the characters' understanding of what they need to do to prevent it. Also, perhaps a character who has been in the background suddenly reveals a powerful and unexpected quirk that saves the day.
One of the most exciting plot twists could be a character who was thought to be a villain turning out to be a hero all along. For example, in some fanfictions, a Sith - like character might actually be working undercover to save the galaxy. Another great twist could be a major character's unexpected death that changes the whole course of the story. It shakes up the familiar Star Wars universe we know and forces other characters to step up in new ways.
In a scenario where the Mikaelsons meet the Cullens, there could be some interesting alliances or rivalries. Maybe some of the younger members from both families might be intrigued by each other. For example, Klaus from the Mikaelsons and Edward from the Cullens could have a very tense relationship. Klaus is all about power and dominance, while Edward is more focused on protecting his family and Bella. Their different priorities could lead to some intense confrontations.
In the fanfiction, they might have an intense reunion. Maybe there will be a lot of emotional exchanges, hugs, and smiles. They could start sharing their recent experiences and adventures right away.
In many fanfictions, when Alice and Jasper meet the Cullens, there could be a lot of emotional exchanges. Alice might use her power to foresee some potential events related to the Cullens. Jasper, with his ability to control emotions, could help ease any tensions within the group. They could also exchange gifts or tokens of friendship, strengthening their bond as a vampire family.
Often, they are received with open arms. The Cullens value family and friendship. Since Alice and Jasper are part of their extended family, there would be hugs, smiles, and lots of chatter. They might immediately start sharing news about other vampires or events in the vampire world.
Maybe Bella turns out to have a connection to an ancient vampire lineage that has a feud with the Cullens. This would create a lot of tension and conflict as she tries to navigate her feelings for the Cullens while dealing with this newfound connection.
One idea could be time travel in the fanfiction. The main character goes to the future and discovers a world where technology has both saved and endangered humanity. For example, there are flying cars but also a great divide between the rich who can afford advanced healthcare and the poor who can't.