One idea could be exploring the relationships between the new generation and the old. For example, how Boruto's group interacts with the likes of Naruto and Sasuke. Maybe they go on a joint mission where the older shinobi teach the younger ones some old - fashioned ninja skills that have been long forgotten.
A third idea is to focus on the personal growth of one of the new generation characters. Let's say Sarada. She could be on a journey to discover more about her Uchiha heritage and the power that comes with it. Along the way, she might face challenges that test her loyalty to her friends and family, as well as her own beliefs. This could involve her delving into the dark past of the Uchiha clan and coming to terms with it.
Another interesting plot could be about a rift within the next - generation ninja community. Some might believe in following the old ways strictly, while others want to modernize ninja techniques. This conflict could lead to internal battles and eventually a realization that a balance between the old and new is necessary for the future of the ninja world.
One idea could be to explore the backstories of the gym leaders before they became leaders. For example, how did they start their Pokemon journey and what challenges they faced to reach their position.
A third idea is to focus on a tournament among the new generation. But instead of just physical combat, it also includes challenges related to knowledge of the Dragon Balls' history and power. This would not only test their fighting abilities but also their understanding of their own heritage.
In a naruto next gen fanfic, you might consider having the new generation face a threat that is completely different from what the previous generation dealt with. It could be a new type of enemy that uses a form of jutsu that no one has ever seen before. This would force the young ninjas to think outside the box and develop new strategies. You could also explore their personal growth, like how a character who was initially shy and insecure becomes a strong and confident ninja through their experiences.
One idea could be focusing on the children of Naruto and Hinata. Maybe their son has to deal with a new and powerful enemy that is targeting the Uzumaki clan. He could discover some long - lost jutsu that his father didn't know about and use it to defeat the foe.
One idea could be a crossover where the Naruto characters visit the world of the Kids Next Door. Maybe Naruto and his friends join the KND in one of their missions against the adults. Another idea is to have the KND use some of the ninja techniques from Naruto, like Naruto teaching them how to do the shadow clone jutsu.
One idea could be that the next - generation Avengers have to face a new villain who has the power to manipulate time. They must travel through different eras to stop the villain from changing key events in history that would lead to the destruction of the world as they know it.
Boruto is an obvious choice. He is the main character of the new generation, and his story has a lot of potential for fanfic exploration. You can write about his growth as a ninja, his relationship with his father Naruto, and his own unique ninja abilities.
An interesting plot idea for Naruto fanfic might be to focus on the life of a minor character. For instance, what if we told the story of a genin who never made it to be a chunin but still had a significant impact on the village in some other way? Or a story where all the ninja abilities are suddenly switched among the characters, and they have to adapt to these new powers while still facing their usual enemies. This could lead to some really fun and unexpected character interactions.
One idea could be Boruto going on a solo mission to a far - off land that has a unique chakra - based mystery. Maybe there's an ancient power there that's starting to awaken and Boruto has to figure out how to stop it from being misused.