One idea could be that Yuriko is a new ninja in Konoha and Naruto befriends her. They go on a mission together where they have to protect a village from bandits. Naruto's positive attitude rubs off on Yuriko and she becomes more confident in her skills.
One idea could be a story where Naruto discovers he has electrokinesis after a strange encounter with a lightning - based jutsu gone wrong. He has to learn to control this new power while still dealing with his regular ninja training and missions.
One idea could be a 'what if' story. What if Haku survived? They could team up with Naruto to take on new threats in the ninja world. Naruto's positive influence might change Haku's view on life even more.
A third idea could be a story centered around a tournament. Naruto, Bulma and 21 all enter a tournament for different reasons. Naruto wants to prove his strength, Bulma wants to test some of her new inventions in a combat - like situation and 21 is there because she has no choice. During the tournament, they end up having to team up against a powerful opponent and discover new things about themselves and each other.
One idea could be a crossover adventure where Naruto and Moka find themselves in a strange new world together. They have to combine their unique abilities, Naruto's ninja skills and Moka's vampire powers, to survive and find a way back home.
In a Naruto masterchef fanfiction, Naruto could compete in a cooking competition. He would bring his unique style which combines his love for ramen and his ninja spirit. His opponents might underestimate him at first because he seems so unconventional. But then he wows everyone with his creative dishes that are inspired by his friends and their different abilities.
A third idea is to explore the emotional toll the war takes on Naruto. He's always been a positive character, but the reality of war might break him down at times. He could struggle with the loss of comrades, and this could lead to some internal conflict. For instance, he might question whether his way of non - killing is still viable in a situation where the enemy is so ruthless. This would add depth to his character and show his journey of self - discovery during the war.
One idea could be a story where Himawari discovers a new ninja technique and Naruto helps her perfect it. They could have training sessions together, and Naruto shares his own experiences from when he was learning new jutsus. This would strengthen their bond as father - daughter and also show Himawari's growth as a ninja in - training.
One idea could be Naruto getting injured during a major battle and having to use a wheelchair while he recovers. His friends could help him adapt and he might find new ways to train in his restricted state.
One idea could be Naruto using his shadow clone jutsu to handle multiple kids at once. He could make clones to play different games with the children, like one clone for tag and another for hide - and - seek.