One possibility is that Naruto delves deeper into the Uzumaki heritage through becoming like Kushina. He could start to understand the family secrets and powers that Kushina once held. This could lead to him unlocking new levels of strength. Maybe he also starts to have the same kind of relationships that Kushina had, like forming strong bonds with the village elders or other clans, just as she did in the past.
If Naruto becomes a mini Kyuubi in the fanfiction, it would be a huge change for him. He'd have to deal with new instincts that come with being part - Kyuubi. He might be more aggressive at times, but he'd have to learn to control that. His relationship with the other villagers could also change. Some might be more accepting since he's using the Kyuubi's power for good, while others might still be afraid. And his training would be different. He'd have to focus on mastering his new form and powers, which could involve some really cool new jutsu and fighting styles.
In this fanfiction, Kushina becoming Naruto's maid could lead to some really heartwarming scenarios. She might use her motherly instincts to take extra - good care of Naruto. For example, she could cook his favorite meals and keep his place spotless. Also, she would probably be very protective of him, just like she was when he was a baby.
Well, he might face some challenges too. Other characters might be afraid or suspicious of his new form. They could mistake him for a threat, like when he first had the Kyuubi inside him. Also, Naruto would have to learn how to control this new mini Kyuubi form. It could be difficult as the Kyuubi's power is wild. But if he manages to control it, he could use it to protect the village in new and unexpected ways.
Well, in a fanfiction, it might be due to a curse. There could be a curse placed on Naruto that slowly transforms him into Kushina Uzumaki. This curse could be related to some dark secret in the Uzumaki clan's past. Or perhaps a strange experiment by Orochimaru or another rogue ninja that goes wrong and causes Naruto to take on Kushina's form and some of her abilities.
His relationship with Sasuke could change. Since Kushina was very protective, Naruto might be even more over - protective of Sasuke. He would not let Sasuke take any unnecessary risks and would always be there to support him, which could either annoy Sasuke or make him appreciate Naruto more.
Well, Naruto might break a bond with Kushina in the fanfiction. Maybe he finds out some dark secret about her that makes him question their relationship.
There could be a scenario where Kushina comes back to life somehow in the fanfiction. She might then play matchmaker between Naruto and Hinata, using her knowledge of Naruto to help Hinata understand him better. For example, she could share stories of Naruto's childhood that would make Hinata feel closer to him.
In this fanfiction, their marriage could also lead to new ninja techniques being developed. Kushina was a powerful kunoichi, and Naruto has his own unique abilities. Combining their skills and knowledge, they could create something entirely new. This could have a significant impact on the Hidden Leaf Village, making it even stronger in the face of threats.
Well, the plot could involve Naruto being influenced by Madara's power and ideology in a miniaturized way. Maybe he starts to see the shinobi world from Madara's perspective, causing conflict within himself as he has always had his own beliefs. He might struggle with the new thoughts that are more in line with Madara's, such as the idea of a total overhaul of the shinobi system. This could lead to his friends being worried about him and trying to bring the old Naruto back.
Well, in this fanfiction, Naruto could bring his ninja skills into the world of Campione. Maybe he'd use his shadow clone jutsu to outwit the Gods in battles. His determination from being a ninja would make him a formidable Campione. He might also form unique relationships with the other Campiones or characters in that universe.