The child might face challenges fitting in with human society later on because of their animal-raised upbringing. Or, the story could focus on how the child uses the lessons learned from the animal to overcome difficult situations in the human world.
One possible scenario could be that he succumbs to the hardships in the village as a child. Maybe the villagers' hatred towards him is too much to bear, and he gets into a situation where he can't defend himself. Another could be that he's on a mission early on and it goes horribly wrong, perhaps facing an enemy far too powerful for his young self.
One possibility is that the child has had a bad dream. Maybe they dreamed of monsters or being in a dangerous situation like a big storm or a fire. Another scenario could be that they are in a new and unfamiliar environment, such as a new house or a new school. The strangeness of it all makes them feel scared.
Perhaps it's a city where women have formed a close-knit community focused on art, culture, and spiritual growth, free from the influence of men.
One possible scenario could be a natural disaster like a massive asteroid hitting the Earth. This would cause widespread destruction, huge tsunamis, and change the climate drastically. It might wipe out a large part of life on the planet.
Perhaps it's a story about a clumsy magician. He tries to pull a rabbit out of his hat, but instead, he pulls out a bunch of handkerchiefs all tangled up. And then he tries to untangle them while the audience is laughing at his blunder. This could be what 'it kind of a funny story' is about.
A story about a fire could have a person reflecting on their life while fighting the flames. It could also show the heroic efforts of multiple fire departments collaborating to put out the blaze. Or perhaps there's a love story that blossoms amidst the chaos of the fire.
It could involve a crime scene investigation where fingerprints are the key to solving the mystery.
It could be a survival situation in a post-apocalyptic world. Maybe resources are scarce and people are forced to fight for them.
One possible scenario could be that he was killed by Voldemort at a very young age, perhaps before he even got to Hogwarts. This would completely change the course of the wizarding world as we know it. Without Harry, there would be no 'Chosen One' to oppose Voldemort, and the Dark Lord might have achieved total domination much earlier.
In such fanfiction, one scenario could be that Naruto's child is abandoned due to his dangerous lifestyle as a ninja. His enemies might target his family, forcing him to send his child away for safety. Another possibility is that the child has some sort of special power that is not understood and feared by the village, leading to its abandonment. Or perhaps Naruto is in a difficult situation where he believes he can't take care of the child properly, like if he's constantly away on missions and has no support system at home.