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.
One possible reason could be some sort of dark force influencing Kushina's mind. Maybe she was under a powerful genjutsu that made her think she had to abandon Naruto for his own safety, even though it was a false perception.
I'm not sure specifically as there could be many different plots in such a fanfiction. It might involve Naruto having some god - like powers but being rejected or abandoned by his mother Kushina for various reasons, perhaps due to fear of his power or some dark influence.
Well, in such a fanfiction, Naruto might initially be filled with anger and confusion. He may have a harder time connecting with his peers in the village. As he gets older, he could start to piece together the events that led to Kushina's abandonment. Maybe there was some dark force or misunderstanding that caused it. This could lead to a whole series of adventures where he tries to set things right or find a new family in the form of his friends and mentors.
In this type of fanfiction, the story could also focus on how the village might react differently to Naruto. Without Kushina's presence, which could potentially have been a positive influence, Naruto might face more hostility. His struggle to fit in and gain acceptance could be more arduous, and this could be what drives him to the brink of insanity. Maybe he would develop a more jaded view of the world and the people in it.
Fanfiction about Naruto being abandoned by Minato and Kushina can also be a way to explore different power - up scenarios. Since he doesn't have the emotional support from his parents, he might be forced to seek power in other ways, which could lead to a Naruto with a very different set of skills and abilities compared to the original series.
In the 'dark naruto abandoned by kushina fanfic', Naruto could be shunned by the village due to his mother's abandonment. This isolation drives him to the dark side. He may learn unique and forbidden jutsu from mysterious sources. His goal could be to reshape the ninja world in a way that would make those who abandoned him regret their actions. He might also have internal struggles between the remnants of his good nature and the new - found darkness within him.
Perhaps in this fanfiction, Naruto, abandoned by Kushina, ends up in a world where ninjas don't exist in the same way. He has to adapt to a completely different lifestyle. But he still holds onto his ninja spirit. As he grows, he discovers secrets about his family that Kushina never told him and that knowledge helps him become stronger and more self - assured.
One common theme is isolation. Naruto would be all alone without his parents, and this would shape his relationships. Another theme is revenge. In some fanfictions, he might seek revenge on the village for his abandonment.
There would be a lot of anger. Naruto might be angry at his parents for leaving him, and this anger could fuel his determination in some ways. For example, he could strive to become a great ninja just to prove that he didn't need them. But it could also cause problems in his relationships, as he might lash out when reminded of his abandonment.