Well, perhaps in this fanfic, there could be a betrayal within the village that Naruto fails to foresee. His friends or comrades turn against him due to some dark magic or mind control. As a result, he is caught off - guard and killed. It would be a very different and somewhat depressing spin on the Naruto we all know and love.
One possible plot could be that in a dark and alternate universe. Naruto might be facing an overwhelmingly powerful enemy that he simply can't defeat. Maybe an ancient evil has been unleashed and Naruto sacrifices himself to save the village. This would be a very tragic take on the Naruto story as he is usually seen as a symbol of hope and victory.
In this fanfic, it could be that Naruto is poisoned by a new and undetectable toxin. He gradually weakens and despite the efforts of Tsunade and the other medical ninjas, they are unable to find a cure. As he nears death, he reflects on his life and the dreams he had for the future of the village. His death would have a profound impact on the other characters, like Sasuke might be filled with regret for not being there for Naruto, and Hinata would be heartbroken.
Minati could be deeply saddened. If he has been following Naruto's journey, seeing him die would be like losing a friend. He might shed some tears and feel a sense of emptiness. He may also feel angry towards the circumstances or the character responsible for Naruto's death.
Well, he might be really confused at first. Death Battle fanfic often has really out - there match - ups and scenarios that don't exist in his world. He could be intrigued by the different power - level interpretations and the creative battles that the fanfic writers come up with.
Well, it could involve the characters seeing different versions of their future selves. Maybe they see themselves achieving great power or facing great tragedies. They might then try to change the course of events based on what they've seen.
In such a fanfic, perhaps Naruto is betrayed by his village and left in the forest. Maybe there are enemies lurking in the forest that he has to face alone. It could also involve Naruto's struggle to survive and his journey to find out why he was abandoned like this.
One possible plot could be that Mikoto somehow survived and she takes Naruto under her wing. She trains him secretly, using her Uchiha knowledge to make him stronger. This could lead to Naruto having a unique set of skills that no one else has.
Well, one possibility is that Naruto resigns due to feeling burnt out from all the battles and political unrest in the village. He might decide he's done his part and wants a simple life away from the chaos.
Maybe Naruto discovers some dark secrets about his family that completely shatter his world view. For example, he finds out that his father was involved in some really bad things. This revelation makes him question everything he believed in and he becomes emo as a result. He might start wearing darker clothes, cutting off his hair, and his behavior towards others becomes cold and distant.
One possible plot could be that Naruto is wrongly accused of a crime he didn't commit. Maybe he was framed by an old enemy who wants to see him suffer. While in prison, he tries to prove his innocence. He could use his ninja skills subtly to gather evidence within the prison walls, and also make some unlikely allies among the inmates who start to believe in his innocence as they get to know him better.
In a 'naruto is a uchiha fanfic', a possible plot could be that Naruto is so inspired by the Uchiha that he tries to bring back the glory of the clan. He starts by trying to understand their culture and values better. He could try to convince the village to support the revival of the Uchiha name. This would likely involve him dealing with the political aspects of the village as well as any lingering grudges against the Uchiha. He may also have to face off against those who would rather see the Uchiha stay in the past, all while learning more about the Uchiha's unique abilities and trying to incorporate them into his own fighting style.
There are probably 'naruto is evil' fanfics out there. A possible plot could be that Naruto is influenced by some dark force. This force twists his perception of right and wrong. As a result, he starts to target his former friends and allies. He might use his skills to cause chaos in the ninja world, believing that the current system is corrupt and needs to be overthrown.