It could be a rogue ninja who is after Sakumo's hidden techniques. Since Naruto meets Sakumo, this rogue ninja sees Naruto as an obstacle and tries to eliminate him. This antagonist might have a grudge against the Hatake clan and wants to use Sakumo's secrets for his own evil purposes.
One possible plot could be that Naruto accidentally time - travels and meets Sakumo Hatake. Sakumo, being an experienced ninja, could start training Naruto, sharing his unique jutsu and combat wisdom. This encounter might change Naruto's understanding of ninja values and help him grow even stronger in his own time.
Well, it's hard to name just a few as there are so many talented writers out there. But some authors who have a good reputation for writing in this area might be those who really understand the Naruto universe and the character of Sakumo Hatake. They are the ones who can write about his relationship with other characters in a believable way.
It could be Orochimaru. He has always been interested in powerful abilities like the Sharingan. In this fanfiction, he might try to steal Naruto's newly acquired Sharingan for his own experiments and to increase his power even more.
One possibility is that Naruto would inherit some of Sakumo's unique skills. Maybe he'd be even more proficient with a sword from an early age. Also, his relationship with Kakashi would be very different, perhaps more like a family bond. Sakumo's reputation might also influence how Naruto is perceived in the village, either positively or negatively.
One interesting fanfiction could be about Sakumo Hatake's early days as a ninja, his training methods, and how they might have influenced Naruto later. For example, a story could explore how Sakumo's values of loyalty and self - sacrifice were passed down in the village and how Naruto might have learned from his legacy.
In a fanfiction where Naruto is trained by Sakumo Hatake, Naruto might learn some unique jutsu. Sakumo was known for his skills, so Naruto could inherit some of his sword - based techniques. Maybe Naruto would develop a new style of combat that combines his own Uzumaki chakra powers with Sakumo's teachings.
Maybe Orochimaru could be the antagonist. He hears about Naruto's encounter with Yagura and wants to use their connection for his own evil experiments. He might try to capture Yagura again (if he was once under Orochimaru's control) or manipulate Naruto into doing something that would harm Yagura and the relationship between the two villages.
One good one could be 'The Hatake Legacy' where Sakumo Hatake plays a crucial role in Naruto's growth. It shows how Sakumo's wisdom and skills are passed on to Naruto in a unique way.
One possible plot twist could be that Naruto inherits Sakumo's unique sword skills. Since Sakumo was known for his swordsmanship, Naruto might have to balance learning his regular ninja skills with these new, inherited techniques. This could lead to interesting battles where he surprises his opponents with a different fighting style.
Maybe a powerful rogue ninja who has discovered a way to steal the powers of divine entities. He sets his sights on Amaterasu and Naruto because he knows that if he can combine their powers, he will be unstoppable. He creates various traps and illusions to separate them and weaken them so that he can carry out his evil plan.