The plot would change significantly. Without the early orphan - like experience, Naruto wouldn't have the same underdog story. He'd have a different set of relationships. His bond with Sasuke might not be as intense as they wouldn't share the same kind of loneliness. And the village's perception of Naruto would be different. They might see him as a more normal kid with a powerful mother, rather than an outcast with a dangerous secret. This would change the way the story unfolds, especially when it comes to the major conflicts in the Naruto universe.
The plot would be completely different. For starters, there might not be the whole 'Nine - Tails as a lonely burden' aspect as Kushina could have helped Naruto understand and control it better. The Akatsuki's plans regarding the Nine - Tails would also be thwarted more easily. Also, Naruto might not have the same drive to become Hokage in the same way. Since he had a loving mother, his goals could be more about protecting his family and the Uzumaki legacy rather than seeking validation through the Hokage title.
Naruto might be more assertive. Since Kushina was a strong - willed person, Naruto would likely inherit some of that. He would be less likely to be pushed around and more likely to stand up for himself earlier. Also, he might be more family - oriented as he would have grown up with a loving mother figure in Kushina.
His relationship with Sasuke would be different. Instead of the rivalry born out of their time in Konoha, it could be more of a friendly competition between two powerful clans. Naruto, being Uzumaki - raised, would have a different perspective on power and friendship.
His relationship with Sasuke would be different. Without the shared experience of being outcasts in the village, they might not have the same initial bond. Naruto would have a stronger support system from his Uzumaki family, so he might not be as desperate for Sasuke's friendship in the same way.
One possible plot could be that Naruto grows up with a strong mother figure. Kushina might teach him early on about his Uzumaki heritage, which could make him more confident. He might also learn her unique chakra control techniques much earlier, leading to him being more advanced in his ninja skills at a younger age.
He might be more confident. The Uzumaki clan had a strong reputation, and growing up with that knowledge could give Naruto a sense of pride and assurance from the start. He wouldn't have to struggle as much with feelings of being an outcast like in the original story.
If raised by Kushina, Naruto would have a more nurturing personality. Since Kushina is a loving mother figure, Naruto would grow up seeing and learning from her kindness. He'd be less likely to seek attention through pranks as he'd already have the love and attention he needed at home. His self - esteem would be higher, and he might be more diplomatic in his interactions with others, having learned from Kushina's way of handling things.
If Naruto was raised by Kushina Uzumaki, his character would likely be more confident from the start. Kushina was a strong - willed and loving person. She could have passed on her fiery spirit to Naruto. He might not have the same insecurities about being alone as he did in the original story. For example, he'd have a mother figure to encourage him and teach him about his Uzumaki heritage, which could make him more self - assured in his abilities.
Well, if Naruto were Kushina's older brother, the whole story of Naruto would be turned on its head. The story would start with Naruto already having a family connection to the Uzumaki clan. His training and development would likely be different as he would have grown up with Kushina. He might have learned some unique Uzumaki techniques from their family. His relationship with the other characters would also change. For instance, his relationship with Jiraiya might be different as Jiraiya might also see Naruto in a different light due to his relation to Kushina. And when it comes to the big events in the Naruto universe, Naruto would be in a position to directly influence Kushina's actions, which could change the course of many events.
His personality might be more confident. Mito was a strong - willed woman, and growing up under her care, Naruto would likely absorb some of that confidence. He'd probably be less of a prankster as he'd be more focused on learning the Uzumaki ways.
The plot would change a great deal. For example, Naruto might not have that initial drive to become Hokage just to be recognized. His goals could be more centered around family and protecting the village in the name of his mother. Also, his relationships with other characters like Sasuke would be different. He might not be as competitive with Sasuke since he'd have a more stable upbringing.