One idea could be that Naruto is sent on a mission to the Hidden Mist Village and gets separated from his team. He then has to adapt to the Mist Ninja ways to survive. He might learn their unique jutsu, like some water - based techniques, and form unexpected alliances with Mist Ninja who admire his determination.
In the 'ninja vs dragon novel', the outcome could be influenced by the plot. Maybe the ninja is on a quest to protect something that the dragon is threatening. If the story is about the underdog triumphing, the ninja might find a way to defeat the dragon through cunning and determination. They could set traps, use their knowledge of the terrain, or even form an alliance with other creatures to take on the dragon.
One common theme is redemption. Many stories feature mist ninjas who have made mistakes in the past and are seeking to make up for it. Another is the struggle for power within the Hidden Mist Village.
The ninja in this novel may have a code of honor that guides their actions. This could play a role in how they face the dragon. They might be reluctant to use underhanded tactics unless absolutely necessary. The dragon, being a mythical creature, may have unique features. It could have a long lifespan, which gives it more experience and knowledge. It may also be territorial, which is why it might come into conflict with the ninja in the first place.
Minato might also be a prominent character. As their teacher, he can influence the way Obito and Kakashi interact. In some fan fictions, he could be the one to help them resolve their differences or provide some crucial information about their past that changes their current situation.
If Naruto becomes a Mist Ninja in fanfiction, it would have a huge impact on the ninja world's politics. Konoha might see him as a traitor, or they could try to negotiate with the Hidden Mist for his return. The Hidden Mist, on the other hand, would gain a powerful ally in Naruto. This could change the balance of power between the villages. Naruto himself would be in a unique position to bridge the gap between the two villages, using his newfound knowledge of the Mist Ninja and his roots in Konoha to promote peace and understanding.
Some fanfictions might explore the emotional aspect of their fight. For example, how their past friendship affects the battle. Maybe Kakashi hesitates to strike a fatal blow because of their shared history.
One great naruto mist ninja fanfiction is 'The Mist's Hidden Hope'. It focuses on a young mist ninja's journey to prove himself in the Hidden Mist Village. Another one is 'Mist Ninja Redemption' which tells a story about a former rogue mist ninja trying to find his place back in the village.