One concept could be the transfer of spiritual energy. If Naruto is a conduit, he might be able to transfer spiritual energy from one place or being to another. Another could be the connection to an elemental source. Maybe he becomes a conduit for a particular element, like fire or water, in a more profound way than normal ninja abilities.
It could have tales of a civilian child who dreams of becoming a ninja but faces many obstacles because of their civilian status, like lack of proper training facilities or discrimination from ninja families. Another example might be a story about a civilian artist who uses their art to document the events and people in the ninja - filled world around them.
One example could be a story where Kurama has the ability to communicate with Naruto telepathically even more often and in more complex ways. Another might be a scenario where Kurama reveals a secret power that he has been hiding from Naruto all along. Or it could be a fanfiction where Kurama gets to interact with other tailed beasts in a new and interesting way while still being closely related to Naruto's story.
Maybe the NSA (National Security Agency) if it involves surveillance and intelligence gathering. Another could be special forces units like the Navy SEALs if it's a combat - related operation.
Maybe Naruto himself starts to question the long - standing rivalries between villages and tries to find a more neutral way to interact with other shinobi. For example, he might try to form a neutral alliance that includes both traditional enemies and allies.
Perhaps in this fanfiction, Naruto is an alpha in terms of his social standing among the ninja villages. He could be the one who always gets the first pick of missions and resources because of his alpha status. Also, in his relationships, he might be more dominant. For example, in his friendship with Sasuke, he could be the one who always makes the final decisions on their joint adventures.
Maybe Naruto gets sent to a far - away land by some mysterious force and has to find his way back. This could involve him facing new enemies and making new allies that are completely different from those in the original Naruto story.
Well, there are many possibilities. Naruto could find that his vizard powers allow him to communicate with spirits in a new way, which could help him in his ninja missions. He might also face internal conflicts as the Hollow part of him tries to take over during intense battles. His vizard powers could attract the attention of powerful villains who want to either control him or steal his powers. He may have to train with a new mentor who is familiar with vizard powers to fully master them. And perhaps he uses his new powers to create a new type of jutsu that combines ninja techniques with vizard abilities.
In this fanfiction, it could be that Naruto's village is suddenly shrouded in a yami - like mist that brings out the worst fears of the villagers. Naruto has to find the source of this mist and dispel it. Along the way, he discovers that there is an ancient evil that was once sealed away and is now trying to break free through the use of yami - related magic. Naruto has to use his own skills and the help of his friends to stop this evil from being unleashed.
Maybe Naruto can sense a powerful and hidden enemy approaching the village long before anyone else. He could then start preparing the village for the upcoming threat, which would show his importance as a sensor.
One concept could be a time - traveling detective. A person who can travel through different time periods to solve historical mysteries. Another idea is a world where dreams are a form of currency. People have to earn and spend their dreams. A third concept might be a group of kids who discover they have superpowers but have to keep it a secret from the adults in a small town.