A future fanfiction could also focus on the political changes in the Hunter Association. There could be a power struggle between different factions. Some might want to make the association more open and inclusive, while others prefer to keep it exclusive. Our main characters could get caught in the middle of this struggle, having to choose sides and fight for what they believe is right for the future of the Hunter world.
One idea could be exploring the next generation of Hunters. Maybe Gon and Killua have kids who inherit their unique abilities and embark on their own adventures. They could face new threats and discover hidden secrets in the Hunter world.
Another interesting aspect for a future fanfiction could be the evolution of Nen. What if there are new types of Nen techniques that are discovered? For example, a form of Nen that can manipulate time on a small scale. The story could revolve around a young Hunter trying to master this new Nen ability while also dealing with the power-hungry villains who want to use it for evil.
One idea could be a crossover with Naruto. Gon and Naruto could team up and learn from each other's unique ninja and hunter skills. They might compete in a friendly way to see who's stronger in different aspects like physical strength or strategy.
One idea could be a crossover where Kagome's spiritual powers are needed in the Hunter x Hunter world to deal with some powerful Nen - using villains. Maybe she teams up with Gon and Killua to fight a common enemy that has a connection to both her world and theirs.
One idea could be exploring a new type of nen ability that a character discovers. For example, a nen ability that allows the user to manipulate time in a very limited way, like slowing down time for a few seconds during a battle. This could add a whole new dimension to the combat in the fanfiction.
One idea could be exploring an uncharted area of the Dark Continent that has unique and deadly creatures not yet seen in the main series. Another could be a story about a group of hunters from different families teaming up specifically for a Dark Continent expedition, facing internal conflicts as well as external threats.
A fanfiction could focus on a character from Harry Potter who is a secret Hunter x Hunter fan. They could be constantly comparing the two worlds in their mind. Like how the Sorting Hat in Harry Potter is similar to the way Hunters are selected in Hunter x Hunter. Or how the Forbidden Forest in Harry Potter has some similarities to the Dark Continent in Hunter x Hunter.
One idea could be exploring the backstories of the members of Genei Ryodan in more detail. For example, how they joined the group and what their lives were like before.
A fanfiction could focus on an alternate universe where Meruem doesn't die and he and Komugi explore different parts of the Hunter x Hunter world together. They could encounter new species and cultures, all while Meruem continues to learn from Komugi's innocence and wisdom.
A plot could revolve around Menchi's past. Maybe she has a hidden connection to a powerful group or a long - lost family member. This could lead to a story of self - discovery as she uncovers secrets from her past while still maintaining her role as a hunter and a food expert. She might have to face old enemies or make difficult choices regarding her new - found knowledge.
One idea could be the main character using gamer skills to quickly learn Nen abilities in unique ways. For example, they might have a leveling system for their Nen types, which gives them an edge in battles against other Hunters or enemies.
A possible plot for 'Kaito Hunter x Hunter fanfiction' is that Kaito enters a special tournament in the Hunter x Hunter world. This tournament has rules and challenges that are different from the normal ones. He meets new and interesting characters during the tournament, some of whom become his friends and some his enemies. As he progresses through the tournament, he uncovers a conspiracy that is related to the very foundation of the Hunter x Hunter world. He then has to decide whether to expose it and risk his life or keep quiet and let the conspiracy continue.