Some great Naruto Shippuden fanfic concepts could be a story centered around the Akatsuki members before they joined the organization. What led them to their paths of darkness? Another could be a fanfic where Hinata becomes a super - powerful ninja in her own right, not just in relation to Naruto. She could have her own unique set of skills and missions. And then there could be a fanfic that focuses on the rivalry between Rock Lee and Neji during the Shippuden era, how they pushed each other to grow and the moments of friendship in between their competitive streaks.
One idea could be a fanfic where Sasuke and Sakura go on a secret mission together during the Shippuden era. They face unexpected challenges that test their relationship and skills.
One idea could be a school sports competition where Naruto's ninja skills give his team an edge in events like track and field. Another could be a school mystery where Sasuke uses his Sharingan to solve it.
One idea could be to rewrite the story from the perspective of a minor character. For example, seeing the events through the eyes of a regular shinobi in Konoha who is not part of the main cast. This would give a fresh view on how the big events impact the everyday life of the village. Another idea is to change the power dynamics. Maybe make some of the weaker characters have a unique power - up that makes them more relevant in the battles. You could also rewrite the story to focus more on the political intrigue between the different villages, showing how the ninja world is affected by power struggles at a higher level.
One plot idea could be Sasuke and Sai being forced to team up on a mission. Sai, with his unique artistic abilities and Sasuke with his powerful jutsu. They start off not getting along as Sasuke is still brooding and Sai doesn't quite understand his ways. But as the mission progresses, they learn to trust each other. For example, Sai could use his ink techniques to create diversions while Sasuke attacks the real enemies from the shadows. This would show their growth as characters and how they can work together despite their differences.
A really interesting plot could be a time - travel fanfiction. Naruto and Temari are sent back in time to a crucial moment in the history of their villages. They have to work together to make sure the events unfold in a way that doesn't change the future too drastically, but also helps to prevent some of the darker events that occurred in their past.
One interesting plot idea could be exploring different character backstories more in - depth. For example, delving deeper into the history of side characters like Kiba and his family. Another could be a rewrite of major battles with different outcomes, like if Sasuke had lost his fight with Itachi.
In this type of fanfiction, there could be a plot where a strange disease starts affecting ninjas' chakra systems. Naruto has to lead the search for a cure, which takes him on a journey across the ninja world. Along the way, he discovers secrets about the origin of chakra that were long forgotten. This could also lead to some interesting character development for other supporting characters as they face this new crisis together.
One interesting plot idea could be Naruto's son, Boruto, facing a new and powerful enemy that has ties to an ancient evil from the past that was thought to be sealed away long ago. This enemy could be manipulating the new generation of shinobi in the Hidden Leaf Village, causing chaos and mistrust among them.
Another idea is a story where Anko discovers a new power within Naruto that no one else has noticed. This could lead to her taking Naruto under her wing in a more personal training session, different from the ones he has had with Kakashi or Jiraiya. It could be a story of Anko helping Naruto unlock this hidden potential while also dealing with her own past traumas related to Orochimaru.
One idea could be a male OC who is a long - lost relative of a major clan. For example, he could be related to the Uchiha clan but was hidden away for some reason. His journey to discover his heritage while also trying to fit into the shinobi world during the Naruto Shippuden era would be full of drama and action. He could struggle with the power of the Sharingan if he inherits it, and deal with the expectations and suspicions of others.