A plot could involve Naruto finding a hidden diary of Kushina's where she wrote about her feelings of being neglected. This could lead to Naruto having a new understanding of his mother and also make him question the way the village has treated him. Or perhaps in a different scenario, both Naruto and Kushina are sent to an alternate dimension where they are both neglected, and they have to rely on each other to find their way back while also dealing with their emotional baggage.
A plot could revolve around Kushina having premonitions about the future of her unborn child during her pregnancy. She might have dreams that she tries to interpret, and this could add an element of mystery. Also, it could be interesting to see how her pregnancy affects her ninja duties, if she has to take a break or if she finds new ways to contribute while pregnant.
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 Kushina being overly possessive when Naruto starts making new friends in the village. She might be constantly worried about his safety and try to limit his interactions in a motherly yet overbearing way. For example, she could be hesitant when Naruto wants to go on missions with his friends at first.
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.
One idea could be a story where Naruto discovers some long - lost Senju abilities passed down from Kushina. This could lead to him having new powers and a deeper connection to the history of the Hidden Leaf. For example, he might be able to use some unique wood - style jutsu in a new way.
Perhaps a story where Mito and Kushina train Naruto in some ancient Uzumaki techniques. Naruto is always eager to learn new things and become stronger. Mito could teach him about the more spiritual and sealing aspects of the Uzumaki powers, while Kushina could focus on the combat - related applications of their chakra. This would not only strengthen Naruto but also deepen his connection to his Uzumaki roots.
Perhaps in the fanfiction, God Naruto discovers a hidden realm where Kushina is trapped. He has to overcome various challenges and trials in this realm to rescue her. Once they are reunited, they could work together to bring about a new era of peace and prosperity in the ninja world. It could also be interesting if God Naruto shares his godly powers with Kushina, making her an even more formidable ninja.
One plot idea could be that Naruto discovers a new jutsu that allows him to communicate with the past and he uses it to control Kushina's actions during a crucial moment in the village's history, like when the Nine - Tails was about to attack. This could lead to a different outcome for the village and Naruto's own family. Another idea is that it's a dream - like state where Naruto is in a special training ground in his mind and he has to control 'Kushina - like' illusions to learn more about his family's secrets and his own power.
One plot idea could be Kushina teaching Naruto about the Uzumaki clan's secrets. For example, she could show him unique sealing jutsus that were passed down in their family. Another idea is Kushina helping Naruto deal with the villagers' hostility towards him in a more proactive way, perhaps by sharing her own experiences of being an outsider when she first came to the village. Also, she could train Naruto in chakra control in a different way compared to Jiraiya, focusing on the Uzumaki's natural affinity for large amounts of chakra.
One plot idea could be a time - traveling story where Naruto gets to meet Kushina and Mito. He could learn about the Uzumaki clan's secrets directly from them. Another idea is a story where Kushina and Mito are brought back to life and they help Naruto in a new and dangerous threat to the Hidden Leaf. Maybe they could teach him some long - lost Uzumaki jutsu.