One possible storyline could be Naruto using his ninja skills in a medical way. For example, he might use his speed to quickly respond to emergency cases in the hospital. He could also use his chakra control to perform precise surgeries that normal doctors couldn't. Maybe he'd develop a new medical jutsu to heal incurable diseases, which would make him a famous doctor not just in his village but across the ninja world.
In this fanfiction, Naruto could be a doctor who specializes in treating ninja - related injuries. Since he has experienced many battles himself, he has a unique understanding of the types of wounds and traumas that ninjas endure. He might develop new rehabilitation techniques for ninjas who have lost their limbs or chakra - using abilities. His kind heart and determination would make him a beloved doctor, always going the extra mile to save his patients.
One interesting storyline could be the Doctor using his time - traveling abilities to visit different eras in the Avengers' timeline and help them prevent disasters that they otherwise couldn't. For example, he could go back to the events of the first Avengers movie and use his knowledge to stop Loki's plan more efficiently.
In a fanfiction, they might become friends through a shared experience like being stranded on an island. They start off as strangers but gradually learn about each other's pasts and find common ground. Naruto's positive attitude helps Gaara open up more, and they form a deep bond that changes Gaara for the better.
Another storyline could involve Naruto's daughter being sent on a special mission that is related to a mystery from Naruto's past. Maybe she discovers some secrets about her father's early days that were never known before. This could lead to her having to make some tough decisions about how to handle this newfound knowledge.
One interesting storyline could be a crossover where Naruto's world of ninjas collides with Seras' vampiric world. Maybe Naruto is on a mission in a strange land and stumbles upon Seras. They could team up to fight a common enemy that threatens both their worlds.
Well, in some Naruto sickle fanfiction, there might be a plot where the sickle is a cursed weapon. It might bring misfortune to whoever wields it, but the main character has to find a way to break the curse. Maybe it was used in a past war and has a dark history. Also, a story could revolve around a young ninja who inherits a sickle from a fallen hero and has to live up to the legacy while also uncovering the secrets of the sickle.
One interesting storyline could be a ninja who discovers a pair of magical headphones in the Naruto world. These headphones might enhance their chakra control when they wear them while training. For example, they could hear the natural flow of chakra in the environment, like the rustling of leaves representing wind chakra or the gurgling of a stream for water chakra.
Another storyline might focus on the relationships between the Sand ninja and the Leaf ninja. For example, how they overcome their past differences and work together on a mission. It could involve a lot of character development and understanding between different cultures in the Naruto universe.
One interesting storyline could be a crossover where Naruto somehow ends up in Hippolyta's world. He might use his ninja skills to help the Amazons in their battles, like using his shadow clone jutsu to create distractions during an enemy attack.
Another storyline might involve Koharu being in danger and Naruto coming to her rescue. In the process, they discover a hidden bond between them that was previously unnoticed. Maybe they find out that they are related in some long - lost way or they just develop a deep friendship that changes the way the village views their relationship.
One interesting storyline could be exploring the backstories of minor characters in the Naruto universe. For example, how a random villager in Konoha came to be there and their family history.