Sasuke could be a great choice. He has powerful abilities and a complex past. His experience as an avenger and then his redemption arc gives him a lot of depth. He has also learned from Naruto and has a different perspective on leadership. He could bring a more strict and strategic approach to being Hokage compared to Naruto.
Well, in a 'naruto the sixth hokage fanfic', it could explore Naruto's relationships in this new role. Maybe it shows how he interacts with his old friends like Sasuke, who might have a role in supporting or challenging him. It could also involve new threats to the village that Naruto has to deal with as the Hokage, and how he uses his unique skills and leadership to overcome them. Additionally, it might delve into the internal politics of the village and how Naruto navigates through them.
Perhaps a powerful and corrupt merchant group could be the antagonists. They are secretly trying to take over the village's economy and resources. They use bribes and blackmail to get their way. The Sixth Hokage discovers their plot and has to stop them without causing too much chaos in the village's economic system. They may also have some ninja mercenaries working for them.
One idea could be that the Sixth Hokage has to deal with a new threat from a long - forgotten clan. This clan has a special jutsu that can disrupt the chakra flow in the village. The Sixth Hokage then has to find a way to counter this jutsu, perhaps by seeking help from an old hermit who knows about ancient chakra techniques.
Naruto himself would be an obvious choice. He has the strength, the popularity among the villagers, and the experience from all his adventures. He would bring a new energy and a more inclusive approach to leading the village.
Perhaps the main antagonist is a spirit or a curse that has been awakened. This curse could be slowly influencing the villagers to turn against Naruto. It could be something that was sealed away long ago and now has broken free due to some mistake or interference. The antagonist could also be a mastermind from another hidden village who is using spies and psychological warfare to undermine Naruto's rule as the Sixth Hokage.
Well, he might implement a policy of more open communication between the different ninja clans. Since Naruto has friends from various clans, he would want to break down any barriers. For example, he could start regular meetings where clan leaders can discuss issues freely, promoting unity in the village.
One idea could be focusing on how the Sixth Hokage deals with new threats from outside the village. For example, a long - lost clan with a powerful and dangerous jutsu resurfaces. The Sixth Hokage has to use both diplomacy and strength to handle the situation.
One idea could be Naruto facing a new and powerful enemy that challenges the very foundation of the Hidden Leaf Village. This enemy might be a rogue ninja with a grudge against Naruto for becoming the Sixth Hokage. Another plot could involve Naruto trying to implement new policies in the village but facing opposition from the traditionalist shinobi. For example, he might want to change the way chunin exams are conducted to be more inclusive, but the old - school ninja don't like the changes. Also, a plot could revolve around Naruto having to deal with a mysterious disease that is affecting the ninja in the village and he has to find a cure while still maintaining his duties as Hokage.