One possible fanfiction could be about Naruto's right arm gaining a new and mysterious power. Maybe it starts to glow with an unknown chakra, and he has to figure out how to control it without losing himself. It could be a power that has a connection to an ancient ninja clan's secret technique.
One possible plot could be Naruto struggling to control the power within Danzo's arm. Maybe the arm has some unique jutsu or abilities that Naruto has to learn to master. He might face challenges from those who fear the power of the arm or want it for themselves.
He could develop a sense of responsibility towards the power the arm holds. Since Danzo misused power, Naruto would strive to use it for good. This could lead to him becoming more mature and strategic in his approach to protecting the village. For example, he might study Danzo's old battle strategies stored in the arm's memories and adapt them to his own fighting style, all while maintaining his core belief in friendship and loyalty.
His right arm could get a cool tattoo that gives him extra powers. For instance, a tattoo that allows him to summon a special type of animal or use a unique jutsu.
One possible motive could be to gain control over Naruto's power. Since Naruto has the Nine - Tails within him, Danzo might want to use that power for his own political or military gains. He's always been power - hungry and sees Naruto as a tool to achieve his goals of making Konoha stronger in his own way, which might involve more underhanded and controlling methods.
It could also be a completely new character introduced into the fanfiction. A foreign ninja who was inspired by some of Danzo's ideas (not the bad ones) and comes to Konoha to take on the role of successor, bringing in new perspectives and ways of doing things.
Another way his story could progress is that he becomes a symbol of resilience. Despite the loss of his arm, he continues to fight for his village and protect his loved ones. This could inspire the younger generation in the fanfiction, showing them that physical disabilities don't mean the end of one's capabilities.
It could also be due to Naruto's outcast status in the village initially. Danzo might think that banishing Naruto would be an easy decision as Naruto doesn't have many supporters at first. He might believe that by getting rid of Naruto, he can maintain the status quo in the village and prevent any disruptions that Naruto's presence might cause in the future.
Well, in some versions, Naruto might use his influence among the villagers. After Pain's attack, the village is in a state of rebuilding and re - evaluating. Naruto, being a hero, has the ears of the people. He could start by presenting evidence of Danzo's underhanded deals, like his connection to Orochimaru perhaps. Maybe he found some secret documents during the chaos that Pain caused, which link Danzo to unethical experiments or power - grabbing within the village.