Well, in this kind of fanfiction, perhaps Naruto's evilness is a result of some dark magic or curse. Kushina then discovers this and tries to find a way to break the curse. It could involve a journey where they both face different challenges. Or, evil Naruto might try to rewrite history in a way that benefits his evil plans, and Kushina has to stop him from distorting the truth of their family and the village.
One idea could be that the evil Naruto tries to manipulate Kushina's power for his own dark purposes. Maybe he wants to take over the Hidden Leaf Village using her influence as his mother. Another could be that he forms an alliance with the village's enemies, and Kushina has to make the tough choice between stopping her son or trying to save him from his evil ways.
In 'evil naruto and kushina fanfiction', it could be that Naruto turns evil due to being ostracized by the village. He then blames Kushina for leaving him alone. This creates a complex relationship between them. Kushina, on the other hand, might try to show Naruto the love he missed out on as a child to turn him back to the good side. There could also be a power struggle between them as Naruto's new - found evil powers might be equal or even greater than Kushina's.
A third plot idea is a crossover where Kushina enters a world that combines Naruto elements with elements from a post - apocalyptic setting. She has to use her ninja skills to survive in this harsh new world. Maybe there are new types of chakra - based threats or she has to find a way to restore order using her leadership skills. This would put her in a completely different situation compared to what she's used to in the normal Naruto world and force her to adapt and grow in new ways.
One idea could be exploring Kushina's life before Naruto was born in more detail. Maybe show her training as a jinchuriki and how she met Minato. Another could be a story where Naruto discovers a hidden journal of Kushina's that reveals family secrets and advice for him.
Well, perhaps Demon Naruto has some sort of special connection to Kushina that is related to his demonic powers. For example, her Uzumaki bloodline might be the key to controlling or understanding his demonic side better. And they could go on a journey to discover the secrets of his powers together.
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.
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 idea could be exploring Kushina's life before Naruto was born in more detail. Maybe show her training as a Jinchuriki and how she met Minato. Another could be a story where Naruto gets to time - travel and meets his mother when she was his age. It would be a great chance to see their relationship develop in a different way.
Well, a plot could be that Kushina is a reincarnated goddess. She doesn't know it at first, but she starts having strange dreams and premonitions. As she discovers her true nature, she has to learn how to use her goddess - like abilities, which include things like super - speed and the power to heal any wound. She then uses these powers to fight against a new and powerful enemy that threatens the ninja world.
Perhaps they are living in a parallel universe where everything is dark and gloomy. Dark Naruto and Dark Kushina could be trying to find a way to break through to the normal universe. They might encounter strange versions of their friends and foes, and have to battle their own inner demons along the way. For example, Dark Naruto might struggle with the darker aspects of the Nine - Tails' power that he has fully embraced in this universe.
One interesting plot could be that 'dark kushina' initially tries to manipulate Naruto for her own goals but gradually develops real feelings for him as she gets to know him better. Another could be that they are forced to work together to save the Hidden Leaf Village from a powerful enemy.
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.