A great plot for 'naruto as guardian ninja fanfiction' could be Naruto becoming the guardian of a group of young orphans who have special ninja abilities. These orphans are being targeted by an evil organization that wants to use their powers for bad. Naruto has to protect them, train them, and at the same time, keep their existence a secret from the world. He would have to deal with the emotional trauma of the orphans and help them grow into strong and kind - hearted ninjas.
Perhaps a fanfiction where the 12 Guardian Ninja have to face a new, extremely powerful enemy. They must use their unique skills and teamwork to overcome this threat. Each Ninja could have a moment to shine, showing off their special abilities. For example, one might use their water - based jutsu to create a huge tidal wave to stop the enemy's advance, while another uses their speed to deliver a crucial strike.
One idea could be a rogue ninja who was once a close friend of Naruto but turned due to a misunderstanding. They could have unique powers and be on a mission to prove their own version of justice.
A cool plot could be that an ice ninja has the power to freeze time within ice. The Akatsuki wants to capture this ninja to use their power for their own evil plans. Naruto and his team must protect the ice ninja and figure out a way to stop the Akatsuki from getting their hands on this dangerous ability.
One idea could be a story where the Ninja Wire is used in a new and unexpected way during a major battle. For example, the characters could use it to create complex traps that not only ensnare enemies but also redirect attacks. Another plot could revolve around a young ninja who discovers a unique property of the Ninja Wire and has to keep it a secret while trying to master it.
One idea could be a story where a medical ninja discovers a new healing jutsu during a difficult mission and has to protect the knowledge from enemy ninjas. Another could be about a medical ninja who uses their skills to heal a long - forgotten and powerful ninja, who then becomes an ally. Or perhaps a story of a medical ninja training under Tsunade to become the best in the village.
One idea could be a story about a young ninja from the Leaf Village who discovers a long - lost jutsu. This jutsu gives them unique powers that no one else has, and they have to learn to control it while facing off against enemies who want to steal it for themselves.
One idea could be a story about a new student at the ninja academy who has a unique and secret jutsu that no one else knows about. This student tries to keep it hidden while also trying to fit in with the other students like Naruto and Sasuke.
One idea could be a trial where Naruto is wrongly accused of a crime he didn't commit, and he has to prove his innocence while facing his own friends' doubts. Another could be a ninja tribunal that is secretly being manipulated by an enemy to frame various shinobi.
One idea could be a medical ninja in Naruto's world discovers a new healing technique that has a strange side - effect. Maybe it temporarily gives the patient the ability to use a powerful jutsu but at the cost of some chakra control. Another plot could involve a medical ninja who has to treat an enemy ninja secretly during a war to prevent a dangerous virus from spreading among all the shinobi. A third idea might be a medical ninja trying to find a cure for a curse mark by using ancient medical scrolls.
A really interesting plot could be about Naruto having to face a new and extremely powerful enemy that is not from the normal ninja world. This enemy could have abilities that are completely foreign to the shinobi, forcing Naruto and his friends to learn new ways to fight and adapt. It could also lead to Naruto having to make some tough decisions that would change the course of his path as a ninja.