One idea could be exploring the backstories of the characters in the 'hopeless kingdom' within the Twilight universe. Maybe a character who was once a normal human in Forks but got dragged into the chaos of the hopeless kingdom. Another could be a love triangle between a vampire, a werewolf, and a human in this new and desolate setting.
Well, you could have a plot where the characters in the Twilight world discover a hidden 'hopeless kingdom' that has been cut off from the rest of their world for centuries. They then have to deal with the strange rules and powers that exist there. For example, there could be a new type of magic that only works in the hopeless kingdom and it affects the vampires and werewolves in unexpected ways.
One interesting aspect could be the unique character interpretations. Maybe a character who was a minor in the original is given a more central and complex role in the fanfiction. For example, a sidekick character might be developed into a powerful force with a tragic backstory.
First, you need to decide on your main characters. Are they going to be existing Twilight characters or new ones? Then, think about the setting of the hopeless kingdom. Is it a dark, gloomy place? Or does it have some hidden beauty? Once you have these basics, start with an interesting opening scene, like a character arriving at the gates of the hopeless kingdom.
A cool plot for 'the last kingdom fanfic' might be to have a character be transported back in time to a crucial moment in the kingdom's history. They would have the knowledge of what's to come but struggle to convince others to believe them. This could lead to all sorts of interesting twists. Or you could write about a character who is secretly training a group of women to be warriors in a society that doesn't really accept that. It would be about breaking gender norms and the challenges they face in a war - torn world.
One idea could be a story from the perspective of a minor character in the Twilight series, like a werewolf from a different pack who has an encounter with the Cullens. It could explore how they view the vampires and their relationships in Forks.
One possible plot idea could be exploring a different backstory for one of the main characters. For example, giving Bella a more complex family history that ties into the vampire - werewolf lore in new ways. Another idea might be a time - travel plot where a character goes back to change an event in the Twilight series, which then has a ripple effect on all the relationships. Or perhaps a story where a new supernatural creature enters Forks and disrupts the existing balance between vampires and werewolves.
One idea could be exploring the backstories of the characters in more depth. For example, delving into their past relationships, traumas, or what led them to be in the situation during the Emerald Twilight. Another could be a 'what if' scenario, like what if a different character had made a crucial decision during that time. Maybe a fanfic where a minor character steps up and changes the course of events.
Another plot could be a time - travel twist. A character accidentally travels back in time and has to navigate the world of Nightfall Twilight in a different era. They might meet younger versions of the main characters and change the future in unexpected ways.
A great plot could involve the inmates of the asylum unknowingly being experimented on by a secret group related to the Twilight lore. They start to develop strange powers or behaviors similar to the supernatural beings in Twilight.
One idea could be a new vampire character arriving in Forks who has a unique power that disrupts the existing power dynamics between the Cullens and other vampires. For example, this new vampire might be able to manipulate time briefly, which could lead to some really interesting situations like preventing certain events from the original 'Twilight' series from happening or changing the way characters interact.
One idea could be that two characters find each other in a post - apocalyptic world. They are from different factions that are usually at odds, but their love overcomes the barriers of hatred and distrust between the groups.