One idea could be exploring Kushina's memories and how she passed on her strength and spirit to Naruto. For example, Naruto discovers a hidden journal of Kushina's that details her training and her hopes for him. Another plot could involve Naruto time - traveling back to when Kushina was young and getting to know her in a different way, perhaps even helping her in some battles and in turn learning more about his own family's history. A third idea is that Kushina's chakra somehow manifests in Naruto during a crucial battle, giving him an unexpected boost and a connection to his mother on a deeper level during the fight.
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.
Perhaps in the fanfiction, Kushina is reborn in a different form, but still retains her memories. She discovers Naruto is in trouble when she starts to regain her past powers. She teams up with some of Naruto's old friends, like Shikamaru, who come up with a brilliant plan. Kushina uses her Uzumaki bloodline trait of being able to sense chakra from afar to track down Naruto. Once she finds him, she uses her own version of the Rasengan, which she developed long ago but never got to use, to defeat the enemy and rescue Naruto.
One idea could be that they escape to a hidden village where Kushina has old friends who can protect them. Another could be that they are on the run from powerful enemies who want to use Naruto's power, and along the way, Kushina teaches Naruto some long - forgotten Uzumaki clan jutsus.
Perhaps the mother was a great ninja in her time, but had to sacrifice something for the village. The son, not fully aware of this at first, starts to uncover the truth as he grows up. He then decides to follow in his mother's footsteps and make the same sacrifice, if necessary, for the greater good of the village. This self - discovery journey can be a great plot for the fanfiction.
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.