Well, a cool plot for 'Naruto Valley of the End Fanfic' might be that the spirits of all the past great ninjas in the Valley start to influence the present. Naruto and Sasuke have to figure out how to deal with this while also mending their own relationship. Or perhaps there's a hidden power in the Valley that only activates when Naruto and Sasuke are both present and in harmony, and they have to discover it to save the Hidden Leaf from a curse. Also, a story where they go back in time to the first fight at the Valley of the End and try to change things could be really interesting.
For a 'Naruto Valley of the End Fanfic', a great plot could be centered around a mysterious figure who emerges from the depths of the Valley. This figure has the power to rewrite memories, and starts to make Naruto and Sasuke forget their bond. As they slowly lose their connection, the ninja world starts to crumble. It's up to their friends to figure out what's going on and bring them back to the Valley of the End to face this threat and restore their memories and their world. Another plot could be that the Valley of the End is a portal to another dimension, and Naruto and Sasuke accidentally get sucked in. There, they find a world full of strange ninjas and have to find a way back home while also learning new jutsu.
One idea could be a what - if scenario where Naruto and Sasuke have a rematch at the Valley of the End years later, but this time they have to team up against a new, powerful enemy that threatens the entire ninja world. Another could be a story exploring the emotional aftermath for Naruto if he had actually killed Sasuke during their fight there. Maybe a fanfic where the Valley of the End becomes a place of peace and training for future generations of ninjas.
One idea could be a story about a new character arriving at Bear Valley Ranch during a twilight time. This character discovers a hidden secret about the ranch that has a connection to the Twilight lore. Maybe it's a special type of plant that only blooms at twilight and has some magical properties related to vampires or werewolves.
An interesting plot idea for Naruto fanfic might be to focus on the life of a minor character. For instance, what if we told the story of a genin who never made it to be a chunin but still had a significant impact on the village in some other way? Or a story where all the ninja abilities are suddenly switched among the characters, and they have to adapt to these new powers while still facing their usual enemies. This could lead to some really fun and unexpected character interactions.
Perhaps in this fanfic, Naruto's death at the Valley of the End could lead to a new era of power struggles. The other ninja villages might try to take over the Leaf's territory. Meanwhile, Naruto's death could inspire a new generation of ninjas who want to uphold his ideals. They would have to fight against the odds to keep the peace that Naruto once fought for.
One idea could be exploring the backstories of the minor characters in Happy Valley in more depth. For example, the life of a local shopkeeper and how they interact with the main characters during the events of the show.
One idea could be exploring the backstories of the dancers in more detail. For example, how they got into dancing at The Pynk in the first place.
One idea could be that Naruto discovers a hidden power within Shenron. For example, instead of just granting wishes in the traditional way, Shenron could offer Naruto a special training regime that enhances his already powerful jutsu. This could lead to Naruto facing new and even stronger enemies.
Another plot could be Samui getting involved in a time - travel adventure. Maybe she gets sent back in time to the era when the ninja world was just being formed. She then has to use her modern - day knowledge and skills to survive in that primitive yet dangerous time, and also has the chance to change the course of ninja history in small ways.
One idea could be that Tayuya, after being defeated, has a change of heart and teams up with Naruto to fight a new common enemy. They could learn from each other's skills and jutsu.
One idea could be Shinachiku going on a journey to discover his own unique ninja skills, different from his father Naruto. He could encounter new enemies and make unexpected allies along the way.
One idea could be that Ageha has a special power that only Naruto can help her control. This power might be related to some ancient ninja art. So, they go on a journey together to master it and along the way, they face many enemies and also make new friends.