Maybe the kid is a huge fan of Spider Man and accidentally stumbles into one of Spider Man's battles. Spider Man saves the kid and then the kid becomes determined to help Spider Man in his crime - fighting. He starts by using his knowledge of technology to upgrade some of Spider Man's gadgets.
In this fanfiction, the kid could be the son of one of Spider Man's old enemies. But instead of following in his parent's footsteps, he idolizes Spider Man. Spider Man initially is cautious around the kid but as he gets to know him, he realizes the kid is genuine. Together, they work to stop a new threat in the city that is related to the kid's family history.
One possible storyline could be that the kid has some special power that Spider Man discovers. For example, the kid might be able to communicate with spiders in a unique way. Spider Man then takes the kid under his wing to train and protect him from villains who might want to use the kid's power for evil.
One possible storyline could be that Spider - Man, while fighting a new villain, is hit by a strange ray that turns him into a kid. He then has to figure out how to reverse the effect while still trying to protect the city. As a kid, he might have to rely more on his wits and less on his physical strength, which could lead to some really interesting situations.
One interesting storyline could be about Spider Man facing a new villain that was created specifically for the fanfiction. This villain might have powers that directly oppose Spider Man's, like the ability to nullify his spider - sense.
Another could be a story where Iron Man mentors Spider - Man in the world of high - tech gadgetry. Spider - Man might be having trouble with his web - shooters, and Iron Man helps him upgrade them to be more efficient and versatile. This could also lead to some humorous moments as Spider - Man tries to adapt to the new tech.
The story could involve the kid getting into trouble at school because he is always talking about Spider - Man. Peter, as Peter Parker, steps in as a mentor to help the kid focus more on his studies. But at the same time, he uses his Spider - Man side to inspire the kid to be brave and stand up to bullies at school.
One interesting storyline could be Silk and Spider - Man teaming up to take on a new super - villain that has the power to manipulate time. They have to figure out how to work together while also dealing with their own personal issues. For example, Silk might be struggling with her newfound powers and how they affect her relationships outside of being a hero, and Spider - Man could be dealing with the pressure of being a public figure.
In some fanfiction, there might be a love story between Spider - Man and Dazzler. They could meet during a city - wide crisis and gradually fall in love as they fight side by side. Their different powers and backgrounds would make for an interesting relationship dynamic.
One interesting storyline could be Spider - Man and Falcon teaming up to stop a new supervillain in the city. This villain might have powers that require both of their unique skills to combat. For example, the villain could be able to fly and shoot energy blasts, so Falcon can take to the air to engage in aerial combat while Spider - Man uses his agility to dodge the blasts on the ground and find a way to disable the villain's power source.
One interesting storyline could be Spider Man and Firestar teaming up to take on a new supervillain in their city. This villain could have powers that force them to use their combined skills in unique ways, like Firestar's ability to fly and create heat blasts along with Spider Man's agility and web - slinging.
One interesting storyline could be Spider Man and Valkyrie teaming up to fight a powerful new villain in New York. Valkyrie's Asgardian powers combined with Spider Man's agility and web - slinging would make for an epic battle. Maybe the villain is a powerful sorcerer who is trying to open a portal to a dark dimension and they have to stop him before it's too late.
One interesting storyline could be Spider - Man and Tigra teaming up to fight a new super - villain in the city. Maybe a villain who can control the minds of animals, and Tigra's connection to her feline side makes her both a target and an important asset in the fight. Another could be a story where Spider - Man has to help Tigra when she gets caught in a scientific experiment gone wrong that starts to change her powers in unexpected ways.