A possible plot development could be that Naruto's new - found Tobirama - like behavior causes some friction within his friend group. His friends might be used to the more carefree Naruto, and this new serious and rule - abiding side could make them feel a bit alienated at first.
Well, Naruto might show similar determination as Tobirama. Tobirama was highly determined in building the village and its systems. Naruto could be shown in the fanfiction to have that same unwavering resolve when it comes to protecting the village and making important decisions for its future.
One possible plot development could be Naruto getting into more intense battles with stronger opponents. Since Kenpachi is always seeking strong battles, Naruto may start to do the same. This could lead to him exploring new areas to find worthy foes.
One possible development is that Naruto becomes more composed. Minato was calm under pressure, and Naruto could inherit this trait. He might also become more of a loner at first as Minato was often on solo missions. But as he grows, he would learn to balance this solitude with his need for friends. His leadership skills would improve too, as Minato was a great leader.
Well, he might start being more mysterious like Tobi. He could start using more deception in his actions, for example, hiding his true intentions from his friends just as Tobi often did. Maybe he'll also start using some of Tobi's speech patterns or ways of interacting with others in a more indirect and puzzling way.
Well, Naruto might start showing more wisdom like Hiruzen. He could become more diplomatic in handling situations. For example, when dealing with disputes among the villagers, instead of his usual impulsive reactions, he would think more like Hiruzen, considering the long - term effects on the village as a whole.
In this fanfiction, Naruto could act more aggressively. Kenpachi is known for his brute strength and straightforward fighting style. So Naruto might start relying more on his raw power rather than his usual combination of strategy and power. He may also show less concern for the consequences of his actions during battles, similar to Kenpachi's somewhat carefree attitude in combat.
One possible plot twist could be that Naruto's friends think he's been possessed or something. They would try to find a way to bring the old Naruto back. Another could be that Naruto's new attitude actually makes him a more powerful ninja, which causes some jealousy among his peers.
One possible plot could be that Naruto, for some reason, decides to adopt Sasori's more calculating and detached approach to combat. He might start using puppets or puppet - like techniques in battles, much like Sasori did. Maybe he's on a mission where he has to infiltrate an enemy base and he thinks acting like Sasori would be the best way to succeed.
One possibility is that Naruto's friends launch a rescue mission. They would use their unique skills, like Sasuke's Sharingan or Sakura's medical ninjutsu combined with her combat skills, to find and save Naruto.
One possible plot development could be that they initially fight against each other as enemies, not knowing their relation. Then, through some kind of accident or revelation, they find out they are brothers. This could lead to a lot of internal conflict for both of them, especially for Deidara who has been on the 'wrong side' in the eyes of Konoha. Another development could be that there is a third party who knows about their relation and tries to use it for their own gain, forcing Naruto and Deidara to work together to overcome this threat.