The storyline could start with the discovery of their brotherhood. This would shock both of them as they have been on opposite sides. Then, Naruto would try to convince Nagato to change his ways. Nagato might resist at first, but as he sees Naruto's determination, he would start to question his own actions. Along the way, they might face challenges from other shinobi who don't trust Nagato. But Naruto would protect his brother and they would gradually gain allies. Eventually, they could work towards a new future for the shinobi world, one based on understanding and cooperation.
In this fanfiction, the storyline might develop with a focus on their past. There could be some hidden secrets about their family that led to their separation. As they start to explore these secrets together, they grow closer. Nagato's past traumas could be a major part of the story. Naruto would try to heal Nagato's emotional wounds. At the same time, they would be involved in the larger shinobi politics. Their new - found brotherhood would shake things up. Some might see them as a threat, while others would see them as a hope for a better future. Through many battles and heart - to - heart conversations, they would shape the future of the ninja world.
Their powers could also clash. The Nine - Tails' raw power is very different from the more complex and diverse abilities of the Rinnegan. This could lead to some internal conflicts between them. Naruto might see Nagato's use of the Rinnegan's powers as too extreme at times, while Nagato could think Naruto's reliance on the Nine - Tails is a bit crude. But through their brotherly bond, they could learn to combine their powers effectively. For instance, they could create new jutsu that combine the destructive force of the Nine - Tails with the precise control of the Rinnegan.
Naruto's character could become more conflicted. He has always been about hope and friendship, but being related to Nagato might make him question his own beliefs. He might start to see the world in a more nuanced way, understanding that there are reasons behind Nagato's actions that he previously didn't fully consider.
At first, it could be a bit rocky. Nagato has been through a lot and his views are quite different from Naruto's. But as they start to communicate and learn about their family tie, they might gradually build trust. Naruto would probably be the more open - minded one at the start, trying to reach out to Nagato. Nagato, on the other hand, would be more hesitant but slowly be drawn in by Naruto's sincerity.
If Naruto takes Nagato's eyes in fanfiction, the development could be quite dramatic. Naruto would need to train to master the powers of the eyes. This could lead to him going on a journey to secluded places to practice without endangering others. His friends might try to help him, but they may also be in over their heads. Enemies could band together to try and take the eyes from Naruto, seeing it as an opportunity to gain ultimate power for themselves. This would create a lot of action - packed and tense situations in the story.
The storyline could develop with Naruto initially being in shock. He might then go on a journey of self - discovery to figure out what went wrong. Meanwhile, Sakura might face consequences from the village for her actions.
The storyline could start with Naruto somehow ending up in Aizen's world. At first, he would be confused and on guard. But as he gets to know Aizen, he might see some potential in him. Naruto would try to change Aizen from the inside. Aizen, on the other hand, might see Naruto as a useful tool or an interesting experiment.
The storyline would likely start with Naruto's disillusionment with Konoha. His actions would then shock his friends. Sasuke, for example, might initially be confused but then choose a side. There would be intense battles within the village as Naruto tries to fight against the forces that he now opposes. His former friends and comrades would be torn between loyalty to the village and their friendship with Naruto.
Their relationship could develop slowly. At first, Sai might not understand Naruto's boisterous nature. But as they spend more time together, Sai would start to see the value in Naruto's loyalty and determination. Naruto, on the other hand, would help Sai open up emotionally.
Their relationship could develop through mutual respect. Naruto respects Shikamaru's intelligence, and Shikamaru respects Naruto's strength and never - give - up attitude. This respect would lead them to train together more often. For instance, Naruto could ask Shikamaru to help him with his strategy in battle, and in return, Naruto could teach Shikamaru some new jutsu techniques.
Well, if Naruto was the son of Serafall and Nagato in this fanfiction, the story could start with Naruto having a very different upbringing. He might inherit some of Serafall's magical abilities and Nagato's rinnegan - like powers. This could make him an even more powerful ninja. Maybe he would be shunned at first in the Hidden Leaf Village because of his strange origin, but as he grows, he uses his unique powers to protect the village and gain acceptance.