One possible plotline could be that Kushina's survival changes Naruto's upbringing completely. Instead of being an orphan, he grows up with a loving mother. This could lead to him being more confident and less of an outcast in the village at a young age. He might also learn about the Uzumaki clan's secrets earlier from his mother, which could make him a more formidable ninja even faster.
One possible reason could be a misunderstanding. Maybe some false information was spread about Kushina being a threat to the village, and Naruto, in his role as Hokage or a powerful figure, felt he had no choice but to banish her to protect the village. Another reason might be related to some sort of dark influence or curse that made Naruto act out of character and banish her.
One possible plotline could be Kushina teaching Naruto about the Uzumaki clan's secrets. Since she was an Uzumaki, she could pass on unique jutsu and knowledge that no one else in the village might know. For example, she could teach him advanced sealing techniques. Another plotline could be Kushina's influence on Naruto's relationship with the other villagers. Her presence might have changed how some of the villagers who were once cold to Naruto would now interact with him. Also, Kushina could be involved in the political affairs of the village, using her wisdom and strength to help Konoha face external threats more effectively.
One possible plotline could be Naruto's struggle with abandonment issues. Since Kushina left, Naruto might have a harder time finding his place in the village. He could become more withdrawn and have to fight even harder to prove himself. Another could be the search for Kushina. Naruto might embark on a journey to find out why she left and try to bring her back.
One possible plotline could be that Naruto is influenced by some dark force and turns 'evil'. Kushina, having come back to life somehow, tries to understand what has happened to her son. She then embarks on a journey to find a way to reverse the effects, leading to a series of adventures where they interact in different ways, like Kushina trying to jog Naruto's memories of their family bond.
A possible plotline is that the tail plug was a cursed object that was placed on Kushina by an enemy long ago. Naruto discovers this and tries to break the curse. He goes on a journey to find a way to remove the tail plug and free his mother from its negative effects, all while facing various challenges and enemies along the way.
Another plotline could involve the Shinigami within Naruto having some sort of mission related to Kushina. The Shinigami might need Naruto to help Kushina fulfill an unfinished task. As Naruto and Kushina work together, they also get to bond on a deeper level, with Naruto learning more about his mother's past and her love for the village and his father.
One possible plotline could be that Naruto discovers some long - lost secret about his mother Kushina and decides to leave the village with her to explore this mystery further. Maybe they are on a quest to find some hidden power or knowledge that is related to Kushina's Uzumaki heritage.
One possible plotline could be that Naruto is somehow transported back in time and has to fight Kushina in a misunderstanding. Maybe he's mistaken for an enemy due to some time - warp magic or jutsu gone wrong. Another could be a scenario where Kushina is controlled by an evil force, and Naruto has to fight her to break the control. Or perhaps it's a sparring match in a dream world where Naruto and Kushina test each other's skills without real harm.
One plotline could be that Naruto discovers a hidden power within himself that is linked to Kushina's Uzumaki heritage. This power makes him godlike, and he has to learn to control it while also dealing with the memories and emotions related to Kushina that come with it.
One possible plotline could be that Naruto is an orphan found by a different ninja clan. He grows up with different values and skills, and his path crosses with Kushina in a completely non - family - related way. For example, they could meet as rivals in a ninja tournament. Another plotline might involve Naruto being from another village entirely and coming to Konoha on a mission where he teams up with Kushina to fight a common enemy. They then form a bond based on mutual respect and shared experiences rather than a family connection.