Perhaps they travel back to their own childhoods. Naruto could meet his parents when they were young. Kushina and Mikoto could use their knowledge from the future to train their younger selves better, and also influence Naruto in ways that make him even stronger and more understanding of his heritage at an earlier age.
One idea could be that they travel back to a crucial moment in the history of the ninja world and change some small events that end up having a huge impact on the future. For example, they prevent a certain battle from happening too early, which gives the ninja villages more time to prepare for a bigger threat that was coming later.
One interesting plot idea could be that Naruto travels back in time and meets a young Mikoto. He could end up influencing the events that led to the Uchiha massacre in some way. Maybe he tries to prevent it by changing the relationship between the Uchiha clan and the village.
One plot idea could be that Mikoto travels back in time and tries to prevent certain tragedies from happening in the Naruto universe. Maybe she wants to stop the Uchiha massacre, and in the process, she forms a strong bond with Naruto, who is also involved in her efforts.
Another plot could be that they time - travel to a point where a powerful enemy is about to attack Konoha. Naruto and Mikoto form an unlikely duo. Naruto's ability to inspire and Mikoto's Uchiha powers combine to create a unique defense strategy. Along the way, they might also discover secrets about their own families and the history of the ninja world that were previously unknown.
A really interesting plot would be if there was an alternate reality where Mikoto didn't die and Naruto ended up befriending her in a different way than he did with other characters. Maybe they meet during a time - travel incident and have to work together to fix the timeline. They could learn from each other's experiences and grow closer as they face various challenges along the way. This would involve Naruto sharing his story of being an outcast and Mikoto sharing her knowledge of the Uchiha clan and its secrets.
Well, a really interesting plot could be a fanfiction where Mikoto and Kushina's spirits are somehow able to communicate with Naruto at crucial moments in his life. They give him advice and strength, even though they are no longer alive. Also, a story about how they worked together to try and bridge the gap between the Uchiha and the rest of the village would be fascinating. They could use their influence and relationships to bring about positive change. This would involve a lot of character development for both of them and would show their importance in the Naruto world beyond just being Naruto's mother and a friend's mother.
One interesting plot could be a story where Naruto gets to time - travel and meets his mother Kushina and Mikoto when they were young. He could then use his knowledge from the future to change some events in a positive way.
Their relationships would likely become deeper. Naruto would get to know his mother, Kushina, on a more equal level, and their bond could strengthen as they face challenges together in the past. Mikoto would also be part of this dynamic. Since they are all from different generations but share common goals in the time - travel scenario, they'd grow closer.
Another plot could be a 'what - if' scenario. What if Kushina didn't die? Naruto grows up with his mother around. The story could explore how Kushina helps Naruto train, not just in ninjutsu but also in understanding his Uzumaki heritage. It could also show how their relationship affects Naruto's relationships with others in the village, like how he might be more confident with Kushina's support.
One idea could be a time - travel plot where Naruto, Naruko (presumably a female version of Naruto), and Kushina are all brought together in a different era. They could team up to face a new and powerful enemy that threatens the very existence of their clan or the village. Another could be a story where they are all in a training session together, with Kushina teaching the two younger ones some of her unique ninja techniques.
Perhaps they travel back to a time when the ninja world was in its early stages of conflict. Naruto, with his modern - day skills and Mikoto's traditional jutsu knowledge, work together to bring about a more peaceful start to the ninja world. They might introduce new ways of training or diplomacy that could have long - term positive effects.