A possible plot is that Naruto discovers some dark secrets about Kushina that make him hate her. Meanwhile, he falls in love with someone who is the complete opposite of Kushina in terms of personality. This love interest could be from a different village and together they try to bridge the gap between their villages while Naruto deals with his complex feelings towards Kushina.
One common plot could be Naruto having a difficult past because of Kushina's actions in the fanfic world, which leads to his hatred. And for the 'love' part, it might be Naruto finding love with a new character who helps him heal from the pain caused by his relationship with Kushina. For example, a kind-hearted shinobi who shows Naruto what true family or friendship is like.
Often, in these fanfictions, Naruto has a hidden power that is related to his Uzumaki heritage. This power awakens when he realizes Kushina is in danger from the Kyuubi. He then uses this power to not only save Kushina but also to tame the Kyuubi in a way that no one has ever done before. It could also be that Naruto has made a deal with some other powerful entity that gives him the means to save Kushina from the Kyuubi.
Well, a prevalent theme is the idea of Kushina being a source of inspiration for Naruto. In many fanfictions, Naruto looks up to his mother and her strength, and this motivates him to overcome challenges. Additionally, the theme of Kushina protecting Naruto in a spiritual sense is quite common. She might use her chakra or some special power to shield Naruto from harm. And then there's the theme of Naruto trying to live up to Kushina's legacy, which is often explored in different ways in fan - made stories.
One common theme is family. Since Kushina is Naruto's mother, fanfictions often explore the family bonds. They might show how Naruto's connection to Kushina affects his relationship with the Kyuubi. Another theme is power. The Kyuubi's power within Naruto is a huge aspect. Fanfictions may deal with how Naruto learns to control it, and how Kushina's own experiences with the Kyuubi's power can help or hinder Naruto. Redemption can also be a theme. The Kyuubi, which was once seen as a monster, could be redeemed through its relationship with Naruto and the influence of Kushina's memory.
One common theme is family reunion. Given that Naruto never really knew his mother in the original story, fanfictions often explore the idea of them finally getting to be together and building a relationship. Another theme is the passing on of knowledge. Kushina was a powerful kunoichi, so she might teach Naruto things in the fanfictions.
One theme that frequently shows up is redemption. Kushina might be protecting Naruto to make up for not being able to be there for him when he was growing up. Also, the theme of hope is present. Her protection gives Naruto hope in difficult situations, making him believe that he is not alone and that he has someone looking out for him, no matter what.
A common theme is the power of motherly love. Kushina's love for Naruto drives her to save him, highlighting the strong bond between a mother and son. Another theme is redemption. Sometimes, the story might involve Kushina making up for not being there in Naruto's life before, so saving him is her way of redeeming herself.
A common theme is the exploration of family. Since Naruto grew up without his parents, fanfictions often focus on how Kushina would have been in his life if she had survived. It's about creating that family bond that Naruto was deprived of.
Well, a big theme is the 'what - if' factor. What if Kushina had lived and been able to raise Naruto? Fanfictions explore this by showing their relationship in different ways. There's also the theme of strength. Kushina was a strong ninja, and in these fanfictions, she imparts that strength, both physical and mental, to baby Naruto. And of course, the theme of hope. The idea that with Kushina by his side, Naruto's future would be filled with more hope and less loneliness as a baby.
Some 'Kushina Naruto fanfictions' are centered around alternate universes. In these, Kushina might be from a different clan or have different abilities. This can lead to really interesting storylines, like Kushina being a powerful water - style user from a hidden mist - like village. It changes the dynamics of the Naruto universe and creates unique interactions between characters, especially when it comes to Naruto and his mother.
One popular Naruto and Kushina fanfiction could be one that focuses on Kushina's backstory and her relationship with Naruto in more detail. For example, it might explore how she would have guided Naruto if she had been alive. Another could be a story where they team up to face a new and powerful enemy that the original series didn't cover.