One idea could be exploring the backstory of the little soldier in the Divergent universe more deeply. Maybe they were part of a secret military project within the factions. Another could be a love story where the little soldier falls for someone from a different faction, which challenges the norms of the Divergent society.
Perhaps the little soldier is a double agent, secretly working for two opposing factions at the same time. They are trying to bring peace between the factions but are constantly in danger of being discovered. This could create a lot of tense and exciting moments in the fanfiction as they juggle their two identities.
One idea could be to explore the backstory of the little soldier. Maybe he comes from a long line of soldiers and has to live up to their legacy. Another is to put him in a situation where he has to make a difficult moral choice, like whether to follow orders that seem wrong. A third could be to introduce a friendship with an unlikely character that changes his perspective on the world he's in.
One interesting plot could be a crossover where characters from Harry Potter and Divergent meet in a new, magical - yet post - apocalyptic world. For example, Hermione could use her knowledge to help Tris understand the complex political and magical systems. Another idea might be a story where the sorting hat is introduced to the Divergent factions and has to sort the characters based on their personalities.
One idea could be that Four's little sister discovers a hidden power within herself that is different from the factions' norms. For example, she might have an ability to sense when people are lying in a world where truth is highly valued in different ways among the factions.
It could be a power - hungry leader from one of the main factions. For example, a strict Erudite leader who sees the little soldier as a threat to their plans of total control over the society through knowledge and technology.
Another plot could be that the little mommies decide to put on a big show for their community. They face all kinds of challenges in preparing for it, like finding the right costumes, learning their lines if there are any, and dealing with stage fright. But in the end, they put on an amazing show that brings the whole community together.
Well, you could write about a mage who discovers a unique magical ability that no one else has. This ability could be both a blessing and a curse. For example, it might attract the wrong kind of attention from dark forces. Or perhaps a story where the mages participate in a magical tournament. They would have to use their skills and wits to outperform their opponents, and along the way, they might make new friends or enemies. And don't forget about the possibility of a love story between two mages, which could add an interesting layer of drama.
One idea could be exploring the backstory of the characters before they got married. Maybe how they first met and the initial feelings they had for each other.
One idea could be a crossover where characters from the Underworld and Divergent universes have to team up. For example, Selene from Underworld and Tris from Divergent might find themselves in a situation where they need to combine their skills to fight a common enemy. Maybe a new vampire - faction hybrid is created that threatens both of their worlds, and they have to figure out how to stop it.
One idea could be that the characters from Divergent are magically transported to the wizarding world of Harry Potter. They could be sorted into Hogwarts houses based on their Divergent faction traits. For example, the Dauntless might be sorted into Gryffindor for their courage.
One idea could be exploring what would happen if Tris survived the final battle and had to rebuild the society in a completely different way. Another could be a story from Four's perspective during his early days in Dauntless before Tris arrived.