A possible storyline is that Naruto starts to suspect that there was a darker reason for his parents leaving him. This could lead to a conflict within himself, whether to forgive them or not. He could also meet other orphans in the village and form a sort of support group. They could work together to change the village's perception of orphans. Another idea is that Naruto discovers a secret about his parents that puts him in danger, and he has to fight to protect that secret while also coming to terms with his feelings of abandonment.
There are several possible storylines. Naruto could be constantly haunted by the fact that his parents left him. This could lead to him having nightmares and insecurities. As a result, he might struggle with his ninja training at first. However, he could meet a mentor figure who helps him through it. Another storyline might involve Naruto accidentally stumbling upon a clue about his parents. This sets off a chain of events where he uncovers a conspiracy in the village that was related to his parents' disappearance. Or perhaps Naruto tries to find a substitute family among the villagers, but faces rejection at first, only to later win them over with his determination and kindness.
It has a huge impact. Naruto grows up lonely and ostracized. This abandonment by his parents means he has to create his own family in a sense. He forms strong bonds with his friends like Sasuke and Sakura. His character develops a sense of resilience. He doesn't let the fact that he was left behind break him. Instead, he uses it as fuel to become stronger, both physically and emotionally. He wants to show that even without his parents, he can be someone great.
One possible storyline could be that with his parents alive, Dark Naruto might not have turned so dark in the first place. His parents' love and guidance could have steered him away from the path of darkness. For example, Minato, being a powerful ninja, could have trained Naruto properly from a young age, and Kushina could have provided the emotional support he needed. This would change the whole dynamic of the Naruto universe as we know it, and there would be no need for him to seek power in dark ways.
Well, he could start to explore the reasons behind his parents' neglect. Maybe he uncovers some dark family secrets that were the cause. This could lead him on a path of either revenge or forgiveness. He may also get involved in a conflict that has larger implications for the entire ninja world. And as he faces these challenges, he slowly transforms from a bitter, neglected child to a more self - aware and powerful individual.
One possible storyline could be that Naruto's parents, Minato and Kushina, are alive and they train Naruto from a young age. This would make Naruto an even more powerful ninja earlier on. He would grow up with their love and support, and perhaps not be as much of an outcast in the village as he was in the original story.
Perhaps in this fanfiction, there is a prophecy about Naruto. Some people might believe that Naruto will bring great change, either good or bad, to the ninja world. Those who want to prevent the 'bad' change or those who want to accelerate the 'good' change might kidnap him from his parents. They think they can influence Naruto's upbringing and future actions according to their own desires.
One possible reason could be that they are too involved in their own shinobi duties. The world of ninjas is full of dangerous missions, and they might be constantly away on important tasks, leaving Naruto feeling neglected.
Another idea could be that Naruto discovers some dark family secrets that he can't bear. This could include things like his family being involved in unethical experiments in the past. The shock and disappointment are so great that he loses control and ends up causing harm to his family, though it's a very tragic and complex situation.
One possible reason could be that Kushina was forced to leave Naruto due to some external threat she thought would endanger him more if she stayed. For example, if there were powerful enemies after her and she feared they would use Naruto to get to her.
One possible storyline could be Naruto seeking revenge. Instead of focusing on becoming Hokage to gain recognition, he could be consumed by the need to find and punish those responsible for his parents' deaths. Another could be that he becomes more withdrawn and brooding, and it takes a special person or event to pull him out of his shell and back onto the path of a hero. Or perhaps he discovers some hidden power that his parents left for him to protect himself, which then sets him on a different journey of self - discovery.
One possible storyline could be that Naruto grows up with his parents' love and training. He might become an even more powerful ninja at a younger age. Since Minato was a prodigy and Kushina had strong chakra, they could pass on their skills and knowledge early. Naruto could also have a different personality, more confident and less of an outcast as he has a loving family from the start.