In the realm of fanfiction, this scenario might be the result of a complex backstory. Maybe there was a time - travel element involved. A future version of Bruce Banner went back in time and accidentally became involved in Peter Parker's conception. Or it could be that a powerful being or entity manipulated events so that Peter was born as Banner's son. This kind of relationship creates a whole new set of story possibilities, like how Peter might inherit Banner's scientific genius along with his own Spider - Man abilities.
In fanfiction, anything can happen. Maybe there was some sort of scientific experiment gone wrong or a strange twist of fate. For example, perhaps Banner's DNA was somehow mixed with that of Peter's parents during a top - secret project. This could lead to Peter being biologically related to Banner in the fanfiction universe.
If Peter is Banner's son in fanfiction, there could be a great deal of scientific exploration between them. Peter could learn a whole new level of science from Banner, and they could collaborate on projects. This would enhance Peter's intelligence even more. Also, Peter might struggle with the idea of being related to the Hulk. He'd have to deal with the public perception of his father and how that affects him as Spider - Man.
I really like 'Partners in Science'. In this fanfiction, Peter and Bruce start working together after Peter discovers some strange radiation that he can't figure out on his own. Bruce helps him analyze it, and their friendship grows throughout the story. It has some really cool action scenes where they have to fight off bad guys who are also interested in the radiation.
Perhaps they would team up to fight a common enemy. Peter's agility and combat skills combined with Bruce's Hulk - like strength could make for a formidable duo. They could be facing a villain who is both a scientific threat and a physical menace.
The plot could involve Peter exploring his father's scientific research. Since Bruce is a brilliant scientist, Peter might be intrigued by his work on gamma radiation. He could get into trouble by trying to recreate some of his father's experiments without proper supervision, leading to unexpected and dangerous results.
Another theme is the exploration of their dual identities. Peter has to balance his life as a student and Spider - Man, and Bruce has his own struggles with the Hulk. Fanfictions often explore how they can relate to each other's problems and support one another in dealing with their identities.
One common theme is mentorship. Bruce could be a mentor to Peter, guiding him with his scientific knowledge. For example, in some fics, Bruce helps Peter with his web - shooter technology.
Their first meeting could be a bit awkward. Peter might be a bit star - struck seeing Bruce, and Bruce could be initially cautious around this young, super - powered kid. Maybe Peter accidentally stumbles into Bruce's lab while looking for something related to his own science project.
Well, in fanfiction, anything can be possible. Maybe it could be some sort of multiverse shenanigans. For example, a spell gone wrong in the multiverse could have intertwined the fates of Peter Parker and Loki in such a way that Peter ends up being his son. It could also be a result of some powerful being's meddling with reality for their own purposes.
It could be a mad scientist who is jealous of Bruce's work with gamma radiation and wants to create a similar but more dangerous form of it. This new radiation form accidentally makes Peter sick when he gets in the way during one of the villain's experiments.
One possible plotline could be that Peter Parker gets sick with a mysterious illness that even his enhanced healing can't quickly fix. Dr. Bruce Banner, with his scientific expertise, tries to find a cure. Along the way, they bond over their shared experiences of being different and having to deal with the consequences of their powers.