Well, in a toddler Naruto fanfic, you could have a plot where Naruto discovers a hidden power within himself at a very young age. For example, he might find out he can communicate with plants, which is something no one else in the village can do. This could lead to him making new friends among the plant - like creatures in the forest. Also, a story about toddler Naruto's first encounter with a simple ninja tool, like a shuriken, and how he plays with it in an innocent yet dangerous way would be interesting.
A toddler Naruto fanfic could center around Naruto's relationship with the other toddlers in the village. Maybe there's a toddler who is always getting into trouble, and Naruto tries to be a good influence on him. Or it could be about Naruto's first day at a toddler - only ninja training session, where he's excited but also a bit scared. He could make friends with a shy toddler during the training, and together they learn the basics of being a ninja, like how to hide and seek in a ninja - like way.
One plot idea could be Minato somehow being brought back to life for a short time and getting to spend precious moments with toddler Naruto. He could teach Naruto some basic ninja skills that Naruto would later forget but unconsciously use in his training. Another idea is a story where toddler Naruto is in danger and Minato's spirit appears to protect him, guiding Naruto to use his own latent powers. And perhaps a story where Minato's memories are transferred to toddler Naruto, giving him flashes of his father's life.
One idea could be to create an alternate universe where Naruto has a different elemental affinity from the start. For example, instead of wind, he has lightning. Another could be a fanfic focused on the relationships between the characters outside of the main plot, like how Sakura and Ino rekindle their friendship in a more in - depth way. Or you could write about Naruto's training journey with a different mentor, say Jiraiya's long - lost brother who has a completely different teaching style.
One idea could be a fanfic where Naruto travels to a different dimension where the Akatsuki are the heroes. Another could be a story about Naruto's kids growing up in a world where there's a new threat that they have to face without their parents' immediate help. And a third idea is a fanfic where Naruto discovers a hidden bloodline within himself that gives him unique powers.
One idea could be a fanfic where Sarutobi has to face a new and powerful enemy that threatens the Hidden Leaf Village in a way no one has seen before. This would test his leadership and combat skills.
You could write about a group of Naruto characters traveling to a mysterious 'planet naruto fanfic' and having to adapt to its strange environment. They might encounter new enemies and form unexpected alliances with the locals there.
One idea could be exploring how Naruto's relationship with the tailed beasts changes when he has the power of the 10 - tailed beast. Maybe he struggles to control it at first and has to learn from the other tailed beasts how to manage such immense power.
A great idea for a 'Naruto of the Sand' fanfic is to create an alternate universe where Naruto was actually born in the Sand Village. This would change a lot of the dynamics in the story. He could have different friends, different training methods, and a different relationship with the Kazekage. Also, you could write about a fanfic where the Sand ninjas have to adapt to a new technology that Naruto somehow brings to the village. It could be something like a new type of weapon or a way to enhance their chakra control. Another idea is to make a story about a Sand ninja who goes on a journey to find Naruto in Konoha for a special mission that only Naruto can help with.
One idea could be a fanfic where a new character is a guardian of Naruto's hidden powers. This character secretly protects Naruto from those who might try to steal or misuse his power.
One idea could be a fanfic where Team Naruto goes on a mission to a hidden, magical forest that has the power to bring out their deepest fears and they have to overcome them to complete the mission. Another could be a story where they time - travel back to the days of the First Hokage and get involved in the early battles and politics of Konoha. Maybe a fanfic where they have to team up with their enemies from past missions to fight a common, greater evil that threatens the entire ninja world.
Well, you could write a 'naruto story fanfic' about Naruto's training journey with a new master. This master could teach him some unique and powerful techniques that are not part of the original story. For example, a type of nature transformation that no one in Konoha has ever seen before. Or you could focus on Naruto's relationships in a different way, like how he befriends an outcast ninja from another village who has a special power.