A plot could revolve around a new evil force that specifically targets the new champions. This force is able to nullify their powers, and they have to rely on their wits and the help of some new allies they meet along the way to defeat it. It could also explore how they regain their lost powers in a more creative way than just getting them back magically.
Perhaps the fanfic could be about the new champions training a new generation of heroes. They pass on their skills and knowledge, but also face challenges as the new heroes have different values and ways of thinking. This could lead to conflicts and growth for both the champions and the new heroes, and show how the legacy of the champions is carried forward in a changing world.
It could be about the new champions' backstories. For example, how they came to be champions, their training, and their relationships with the people in their respective regions.
One idea could be a new trainer who has an unusual Pokemon partner, like a shiny Pokemon with a unique ability, and they enter the Champions League. Their journey through the league is filled with unexpected battles and they have to learn new strategies on the fly.
A possible interesting plot could be a new champion emerging from a small, unassuming village. This champion has a unique power that no one has seen before. He or she then decides to enter the championship not for glory, but to find out the truth about their past. Along the way, they make unlikely alliances with other champions, some of whom are initially their rivals. As they progress in the game, they face various challenges that test not only their physical strength but also their moral compass.
One idea could be to focus on the backstory of how Calamity Ganaon came to be. Maybe explore the ancient evils or the events that led to its creation.
A fanfic could show Link being sad after seeing the corrupted forms of the Champions. He remembers them as they were in their pure forms, and seeing them as corrupted spirits or in some other twisted state could break his heart. He might try everything in his power to free them from their corrupted state, and his sadness could fuel his determination in the story.
One idea could be exploring a different perspective of Jacob's transformation. Maybe focus on his internal struggle in a more in - depth way than in the original. For example, how he really feels about his new identity and its impact on his relationship with Bella from his own point of view.
One idea could be that the new king has to face a hidden conspiracy within the world of 'Unordinary'. Maybe some powerful groups are trying to undermine his rule from the start. Another could be that the new king discovers a long - lost power that changes the balance of power in the 'Unordinary' universe. He then has to decide how to use it for the good of all.
Another plot idea could be to focus on the relationships between the RWBY characters during this 'New Divide'. Maybe there are internal conflicts within the teams because of the stress and danger. For instance, Ruby might start to doubt her leadership abilities, and this could cause a rift between her and Weiss. The fanfic could then be about how they overcome this and strengthen their bond again.
Another interesting angle is to focus on the characters that Link interacted with during the game. For example, you could write a fanfiction about Zelda's efforts to rebuild Hyrule and the challenges she faces. It could involve her dealing with political issues among different groups in Hyrule, as well as trying to restore the kingdom's magic. She might also be working on new ways to protect Hyrule from future threats, using her own knowledge and the help of the Sheikah technology. And in the process, Link could come back to offer his assistance from time to time, leading to some emotional reunions and new developments in their relationship.
A great idea for a BotW fanfiction could be a 'what if' scenario. For example, what if Link failed to defeat Calamity Ganon? You could write about how Hyrule is plunged into even deeper despair, and how the remaining survivors, including Zelda, try to fight back. Or perhaps a story centered around the different races of Hyrule working together to build a new city, away from the ruins of the old Hyrule Castle. This could explore their relationships and how they combine their unique skills.