A great plot could involve a mysterious figure who implants the Byakugan into Naruto for an unknown purpose. Naruto starts to see the world in a different way with his new eyes. He can now sense danger more easily and even predict his opponents' moves better. The story could then revolve around Naruto trying to find out who did this to him and why. Along the way, he teams up with some Hyuga members who teach him the secrets of the Byakugan, and together they face a common enemy that threatens the entire ninja world.
The plot could involve Naruto's red eyes being the key to an ancient prophecy. People from other villages might try to capture him to use his eyes for their own gain. Naruto, along with his friends, would have to go on the run and protect himself while also trying to figure out the true meaning behind his red eyes.
The plot might involve Naruto getting Shisui's eyes in a strange accident. With these eyes, he discovers a hidden conspiracy within the Hidden Leaf Village. There are some rogue ninjas who are planning to use a powerful jutsu that can only be countered with the unique abilities of Shisui's eyes. Naruto, with his new - found powers, has to team up with his friends like Sasuke and Sakura to expose the conspiracy and save the village. Along the way, he struggles with controlling the Sharingan's powers and the emotions that come with it.
One plot implication could be that Naruto is initially distrusted by some in the village. They might see the Sharingan as a symbol of danger or the Uchiha's past misdeeds. This could create internal conflict within the village. Also, Naruto might be hunted by enemies who fear the power of the Sharingan in his hands.
One possible plot could be that Yugi discovers a hidden power within the Blue - Eyes White Dragon card that no one else knew about. This power could be the key to defeating a powerful dark force that has been threatening the Duel Monsters world.
One possible plot development could be that Naruto becomes a target. Since Shisui's eyes are so powerful, other villages or rogue ninja might want to take them from Naruto. This would lead to a lot of battles and Naruto having to constantly defend himself. Another development could be that Naruto tries to master the abilities of the Sharingan quickly. He might seek out people who know about the Sharingan, like Kakashi or Sasuke, to train with.
One possible plot could be that Naruto, after years of serving the village, is chosen to be the Daimyo due to his leadership skills. The white hair could be a result of some new jutsu he experimented with that had unforeseen side effects. As Daimyo, he uses his unique position to promote peace between the ninja villages on a different level than before, leveraging his understanding of both ninja and political worlds.
Perhaps the Blue Eyes White Dragon is a spirit sealed within Naruto since birth, but he doesn't know about it until he reaches a certain level of power. As he discovers this, he has to face challenges not only from his enemies in the Naruto universe but also from forces that want to capture the dragon. He has to train to master the dragon's abilities, which include flight and powerful energy blasts, all while still being a ninja.
In a 'Naruto has his eyes stolen' fanfic, the plot might revolve around a new, mysterious villain who targets Naruto specifically for his eyes. Maybe the villain believes Naruto's eyes hold some sort of special power or prophecy. Naruto, in his usual determined way, would not let this setback stop him. He could start training with Jiraiya again, this time focusing on his other senses to compensate for the loss of his eyes. His friends would be in a state of shock and anger, and they would split up to search for clues about the thief.
One possible plot could be that Naruto, after becoming Hokage, decides to form an international army to combat a new and powerful threat that endangers all the ninja villages. This army would consist of ninja from different villages who have put aside their old rivalries under Naruto's leadership.
Maybe the scythe was once owned by a powerful shinobi from a forgotten clan. Naruto finds it and as he wields it, he starts to have strange visions. These visions lead him to new places and he uncovers a conspiracy in the ninja world. The scythe could also change Naruto's fighting style. Instead of his usual close - combat and ninjutsu attacks, he starts using more long - range and slashing - based attacks with the scythe.