One possible plot could be Naruto having to prove himself to the village elders. He might start by implementing new training programs for the younger ninjas, inspired by his own journey. He could also focus on improving relations with other villages, using his charisma and unique perspective as someone who was once an outcast.
In fanfiction, he would be a very innovative Hokage. Naruto has always thought outside the box. As the Fifth Hokage, he would bring in new training methods for the shinobi, new ways of handling village politics, and also new diplomatic strategies with other villages. He wouldn't be afraid to break the old norms if it meant progress for the Hidden Leaf.
One popular storyline could be Naruto taking on the role of the Fifth Hokage in a more challenging way than expected. Maybe he has to deal with a new and powerful enemy right from the start of his tenure. Another could be Naruto exploring the political side of being the Hokage more deeply, having to make tough decisions about the village's alliances and resources. And there could also be a storyline where Naruto discovers some long - hidden secrets about the previous Hokages that directly impact his leadership as the Fifth Hokage.
One challenge could be dealing with the traditionalist shinobi who might not be on board with his more unorthodox methods. They may resist changes he wants to make to the village's training or governance.
Another aspect to explore in the fanfic is Naruto Senju's relationship with the other villages. Given his Senju heritage, there might be different expectations and tensions. He could work towards a more equal - footed relationship with other villages, instead of the traditional power dynamics. This would involve a lot of diplomatic meetings and negotiations, which could be full of drama and intrigue.
Sakura could be really interesting. As a highly skilled medic - ninja, she could play a crucial role in supporting Naruto as the Fifth Hokage. Maybe she has to deal with a new disease outbreak in the village and has to find a cure while Naruto is handling other threats. Kakashi could also be fascinating. He has a wealth of experience and could act as an advisor to Naruto. He might have some old - fashioned ideas that Naruto has to balance with his own more modern approach.
The other ninja clans' leaders would be important characters too. For instance, the Uchiha clan leader (if the story is set at a time when the Uchiha were still in the village) could play a role in the power dynamics related to the fifth Hokage. And of course, the Hokage's personal friends and mentors from their younger days.
One possible plot could be Naruto Namikaze facing new threats to the Hidden Leaf. He might have to deal with a powerful enemy from a neighboring village who is after the village's secrets. He uses his unique skills and leadership to rally the shinobi of the Leaf and come up with new strategies to protect the village.
One possible plot could be Naruto facing intense opposition from the traditionalist shinobi in the village at first. They might doubt his ability due to his unorthodox upbringing. But Naruto, with his determination, starts to prove himself by implementing new training programs for the younger shinobi, inspired by his own experiences. He also focuses on better relations with other villages, using his charisma to create alliances that were previously difficult to form.
He would become more responsible. As Hokage, he has to think about the whole village, not just his friends. So he might be a bit more serious, but still keep his positive and energetic side.