Well, a plot could be that Mikoto, after seeing Naruto's determination, decides to secretly support him in his goal to become Hokage. She provides him with advice and resources on the side, without anyone knowing. Or perhaps a story where they are both on a mission to rescue hostages, and they have to rely on each other's unique abilities to succeed, like Naruto's brute strength and Mikoto's strategic mind.
One plot idea could be that Naruto discovers a hidden jutsu that Mikoto was involved in creating long ago, and they team up to re - master it for the good of the village. Another could be that Mikoto, being an experienced ninja, helps Naruto train in a new form of combat technique that is unique to her clan.
A plot could be that Naruto and his friends are sent to a haunted village that has a similar energy - sealing problem as in The Conjuring. They have to use their ninja skills to find the source of the haunting and seal it. Maybe there are cursed objects like in The Conjuring that are causing chaos in the village.
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.
Another idea is a chakra - related plot. Kushina has a very special chakra, and Naruto could discover some hidden aspect of his own chakra that is related to his mother's. They could then work together to unlock this new power. Along the way, they share stories about their lives, and Naruto learns more about his parents' past and how they met. This would be a great way to build a story around them without any adult content.
A possible plot is that there is a mysterious force that targets the Uzumaki and Uchiha clans. Naruto, Kushina and Mikoto have to team up. Kushina uses her powerful chakra and Mikoto her Uchiha skills, while Naruto uses his determination and new jutsus he has learned. They fight against this unknown enemy to save their clans and the village.
One plot idea could be a story where Naruto discovers hidden memories of his mother Kushina and her relationship with Mikoto. Maybe they were friends who had some sort of unfulfilled promise. Naruto then tries to understand more about their past and in the process, he uncovers secrets that could change the way he views his family and the village.
Perhaps a story where Mikoto's Sharingan has a prophecy locked within it. Naruto, with his unwavering belief in changing destinies, helps Mikoto unlock this prophecy. It could be about a future that is both a threat and an opportunity for the ninja villages. Together, they have to figure out how to either prevent or embrace this future.
Perhaps a plot where Naruto time - travels and meets a younger Mikoto. He then has to navigate the complex world of the past while protecting Mikoto. As he does this, other characters become attracted to him, creating the harem. This could involve a lot of political intrigue and battles against those who oppose Naruto's presence in the past. Also, there could be a lot of character development as Naruto tries to ensure that the future he knows is not changed for the worse. This would also give room for exploring the relationship between Naruto and Mikoto in a different time - setting, and how the other members of the harem fit into this new dynamic.
A good non - adult plot idea is that Mary Jane discovers a way to temporarily suppress Venom's more violent tendencies. She then tries to train Venom to be a force for good in the city. Or perhaps Mary Jane is accidentally exposed to a small part of Venom's symbiote and gains some minor powers, and she has to figure out how to control them while also dealing with Venom who is both intrigued and a bit jealous of her new abilities.
One idea could be that Hinata is hiding under the desk to surprise Naruto for his birthday. She has a handmade gift for him and wants to give it to him in a really special way. When Naruto finally discovers her, his face lights up with joy and they share a really sweet moment.