In a fanfiction scenario, Naruto might kill Danzo as a result of Danzo's actions towards Sasuke. Danzo had a hand in Sasuke's downfall and his thirst for revenge. Naruto, being Sasuke's friend, could not forgive Danzo for this. He challenges Danzo and in a fierce battle, Naruto's strong will and the power of the Nine - Tails allow him to overpower Danzo and end his life, bringing a sense of justice to Sasuke's cause.
One possible plotline could be that Naruto discovers Danzo's dark secrets and decides he has to take action. Maybe Danzo was planning something truly evil against the village that Naruto couldn't let stand. So Naruto, with his newfound power and determination, confronts Danzo in a battle. Naruto uses his Rasengan and outsmarts Danzo's Sharingan - based jutsu to finally defeat him.
Well, in a fanfiction world, Naruto killing Danzo could start with the political unrest in the village. Danzo was always a controversial figure with his own motives. Naruto, who stands for truth and justice in the village, uncovers that Danzo was planning a coup to take over the village leadership in a more forceful and unethical way. Naruto, as the hero of the village, has to stop him. He engages in a battle where he uses his Sage Mode skills and his ability to connect with the other villagers' chakra. With great effort, he defeats Danzo, sacrificing some of his own ideals in the process but saving the village from a potential dictator.
One possible plotline could be Sasuke's revenge-driven journey leading up to the moment he kills Danzo. He might discover new secrets about Danzo's past misdeeds that fuel his hatred even more. For example, he could find out about Danzo's role in the Uchiha massacre in greater detail. Another aspect could be the aftermath of the killing. How does it affect the Hidden Leaf Village? Does it lead to chaos or a new understanding of Sasuke's motives among the villagers?
A possible plotline could be that Naruto is influenced by some dark force or event that makes him see the world more like Danzo. For instance, if there was a new threat to the village that made Naruto believe that extreme measures were necessary. He might start to control the flow of information within the village, just as Danzo did, believing it would keep the villagers safe but actually causing mistrust among them.
One possible plotline could be that Naruto is forced into a situation where he has to kill Itachi to protect the Hidden Leaf. Maybe Itachi is being controlled by some dark force and Naruto, with great reluctance, has to end his life to save the village and his friends.
One possible plotline could be that Naruto, in his 'godlike' state, is pushed to the brink by Sasuke's actions which threaten the safety of the village. Naruto might see no other option but to end Sasuke's life to protect everyone he loves. For example, if Sasuke were to ally with a powerful and evil force that was bent on destroying Konoha, Naruto's extreme power could be the only thing to stop him.
Maybe in the fanfic, Death is not a traditional Grim Reaper - like figure but rather a form of an evil curse that has been plaguing the ninja world. Naruto, being the hero, is the only one with enough positive energy and determination to face it. He could start by gathering allies who have also been affected by this 'Death' curse. Together, they form a plan. Naruto would be the vanguard, using his speed and strength to break through the defenses of the curse - based Death and then use his willpower to shatter it completely.
It's possible in the realm of fanfiction. Danzo is a complex character with access to many secrets and resources. If he were to give Naruto a Sharingan, it would completely change Naruto's power dynamics. Naruto already has his own powerful abilities like the Nine - Tails' chakra, and adding the Sharingan would make him an even more formidable opponent. However, this would also bring new challenges for Naruto in terms of controlling the Sharingan's powers and dealing with the Uchiha - related baggage that comes with it.
One possible motive could be power. Danzo was always obsessed with having power in Konoha. By experimenting on Naruto, who is the Jinchuriki of the Nine - Tails, he might have hoped to harness the power of the Tailed Beast in some way. Maybe he thought he could create a super - soldier or gain some unique abilities from Naruto's connection to the Nine - Tails.
One possible plot could be Naruto developing new and unexpected powers as a result of the experiments. Maybe he has to struggle to control these new abilities while also dealing with his feelings of betrayal towards the village that allowed Danzo to do this to him.
The plot could also involve a time - related crisis. Maybe something is threatening the timeline, and the only way to fix it is for future Naruto to raise his younger self in a certain way. So, future Naruto has to make sure that the younger Naruto grows up to be strong enough to face this threat while also maintaining the integrity of the timeline.
One possible plotline could be Percy gathering a powerful group of demigods and allies. They might embark on a quest to find the ultimate weapon that can defeat Gaea. Along the way, Percy could face many internal struggles, like doubts about his own abilities. He might also have to make some tough choices that could endanger his friends but are necessary to defeat Gaea.