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 aspect could be that the successor discovers some long - hidden secrets left by Danzo. These secrets could be related to powerful jutsu or ancient ninja lore. And as they uncover these secrets, they have to decide whether to use them for the good of the village or keep them buried to avoid causing chaos.
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.
One possible successor could be Haku. In some fanfictions, Haku's skills and his close relationship with Zabuza might lead to him taking on Zabuza's legacy. He has the potential to carry forward Zabuza's unique fighting style and perhaps even his ideals in a new generation within the Naruto universe created by fanfic writers.
The candidates for the Qing throne were the Crown Prince, the Second Prince, the Third Prince, and Fan Xian. However, the search results did not provide a definite answer. Therefore, based on the information provided, I am unable to confirm the candidate for the Qing throne.
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.
He'll likely lose his power and influence in the village. Once Naruto reveals his secrets, the villagers won't trust him anymore. His actions might be put on trial, and he could be exiled from the village.
Sasuke could be a potential successor. He already has a thirst for power and a certain level of cunning. If he were to come across some sort of strange power source that gave him Aizen - like abilities, it would be an interesting twist. He could use his Sharingan in combination with new illusions and mind - control powers.
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.
Well, one possible plot could be Naruto growing up under Danzo's influence. He might be trained in more underhanded and secretive shinobi techniques. For example, he could be taught to prioritize the village's security above all else, even if it means using morally gray methods. This would put him at odds with some of his friends who follow more traditional ninja values.
If Naruto was Danzo's grandson, it would completely change the Naruto universe. Naruto's ideals of friendship and trust would be in direct conflict with Danzo's methods. Naruto might have been trained differently, perhaps more secretly and with a harsher edge. It could also lead to a different dynamic with the other characters. For example, Sasuke might view Naruto even more suspiciously as he had a connection to Danzo, who Sasuke hated. And the village might have treated Naruto differently too, either with more respect due to his relation to a powerful figure or with more fear because of Danzo's controversial reputation.