One possible plot could be that Kushina is somehow influenced by an evil force. This force makes her believe false things about Naruto, like he's a threat to the village in the future. So, she betrays him by revealing his secrets or trying to harm him. Maybe she spreads lies about him which turns the villagers against Naruto even more.
In some really complex fanfic plots, there could be a prophecy or some sort of ancient power play involved. Suppose there is a prophecy that Naruto will bring great destruction in the future, and Kushina is made aware of it through some dark magic or secret organization. She might think that betraying Naruto now is the only way to save the village and the world, even though it goes against her motherly instincts. This would be a very convoluted and interesting take on the idea of her betrayal.
One consequence could be Naruto's emotional turmoil. He would be completely shattered as his mother, who he probably idolizes, has turned against him. This could lead to him doubting himself and his place in the world.
It could also be related to some hidden family secrets or prophecies. Maybe there was a prophecy that Naruto would bring great destruction in the future and Kushina, believing in it, thought she had to stop him before it was too late. This would be a very complex and heart - wrenching betrayal if it was based on such a false premonition.
A simple plot could be Kushina's adventures as a young ninja. She goes on missions, faces various enemies, and discovers new jutsu. For example, she could be part of a team that has to retrieve a powerful artifact from a dangerous location.
Well, the plot might involve Kushina seeing Naruto's potential right from the start and training him intensively. She could also share her own experiences of growing up as an Uzumaki, which could help Naruto better understand his heritage. And perhaps they go on special missions together where Kushina guides Naruto not just in combat but also in making tough decisions. There could be a lot of emotional moments as Kushina fills the role of both a sensei and a mother - like figure to Naruto. Also, Kushina could introduce Naruto to other Uzumaki - related things like ancient seals or special chakra control techniques that were unique to their clan.
Well, one possible plot is that Naruto is left all alone at a very young age by Kushina. This makes him an outcast even more so in the village. He might start to question his identity and purpose. He could end up having a different set of friends or allies, perhaps those who are also outcasts. And as he grows, he has to face the fact that his mother abandoned him while still trying to protect the village that didn't always accept him.
Maybe the 'plug' could be some sort of new jutsu or device in the 'Naruto' universe. The plot could involve Kushina using this 'plug' to gain new powers and protect Konoha. It could also be related to her connection with Naruto, perhaps she discovers this 'plug' has something to do with Naruto's future power or his role in the village.
Well, it could be about Naruto growing up feeling the pain of abandonment by his mother Kushina. Maybe he struggles with self - worth and has a hard time trusting others. He might constantly wonder why she left him and have to face the world alone without a mother figure.
It could also be that the 'enslaves' part is not literal in the sense of physical slavery. Perhaps Naruto has some kind of mental hold over Kushina. For example, he might have discovered a way to manipulate her memories or emotions, which gives him a form of control. This would be a more psychological form of 'enslavement' and could lead to a complex and twisted plot.
Maybe the gods are jealous of Naruto's ability to inspire people. In this fanfic, they could use their divine powers to make it seem like Naruto has committed heinous crimes. His village would turn on him, and he'd be on the run. Along the way, he might discover some ancient power that can counter the gods' treachery and use it to clear his name and get revenge on those who wronged him.