One option is a new, original villain created just for this fanfiction. This villain could be someone who wants to rewrite history and prevent the Fourth Hokage from ever becoming Hokage. So they target Naruto as he is the son of the Fourth Hokage. They might have some sort of time - traveling or reality - warping powers.
In this fanfiction, Naruto might finally get the fatherly guidance he always craved from the Fourth Hokage. Maybe the Fourth Hokage would teach Naruto some long - lost jutsu that only he knew. It could also be a chance for Naruto to understand his father's sacrifices on a deeper level.
It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
Well, it could be that Naruto meets the Hokage in a different time - space. They might work together to change some important events in the history of the village. For example, preventing a great disaster or changing the fate of some important characters. And Naruto could learn a great deal from the Hokage's wisdom and leadership in this encounter.
In this fanfiction, the plot might involve Naruto being tricked by an evil force into believing that the Fourth Hokage has some dark secrets. So he decides to fight him. It could also be a scenario where Naruto enters a different dimension where the Fourth Hokage is being controlled by an outside power, and Naruto has to free him by fighting. And during the fight, Naruto discovers new things about his father and his own abilities.
It could also be a very emotional encounter. Young Naruto might be in awe of seeing his future self as Hokage. Hokage Naruto could tell young Naruto about all the people who believed in him, like Iruka - sensei and Kakashi - sensei. This would make young Naruto realize the importance of the relationships he has and the impact they have on his future.
In this fanfiction, Naruto might learn a lot from the First Hokage. Maybe the First Hokage would teach Naruto some long - lost jutsu. For example, he could show Naruto how to use some ancient earth - style techniques that were powerful but forgotten over time. And Naruto could also ask the First Hokage about the origin of the village, getting a first - hand account of how Konoha was founded.
Sasuke could be an alternative. He has strong ninja skills and a deep understanding of the ninja world. His experiences have made him grow into a very capable person, and his Sharingan gives him an edge in combat and strategic planning.
Yes, in many fanfictions, Naruto is often depicted as a huge fan of the Fourth Hokage. After all, the Fourth Hokage is his father. Naruto grows up idolizing the Fourth Hokage's heroic deeds and wishes to be like him.
It could be a rogue ninja who was once a part of the Akatsuki but managed to escape before their downfall. He's been biding his time, growing stronger, and now he wants to take revenge on Naruto and the Hidden Leaf for what happened to the Akatsuki.
A group of rogue ninjas from other clans who oppose the idea of the Hidden Leaf Village. They see the Shodai Hokage's leadership as a threat to their own power and freedom. They might team up and use underhanded tactics like assassinations, sabotage of the village's resources, and spreading false rumors to try and undermine the Shodai Hokage's authority. They could also form alliances with other enemies of the village, making them a formidable and complex antagonist group.