Their relationship could develop in a mentor - mentee way at first. Tony would teach Peter about science, technology, and how to be a better superhero. As time goes by, they would become more like father and son. Peter would start to look up to Tony not just as Iron Man, but as a dad. For example, they might have movie nights together or Tony would help Peter with his school projects.
One possible plot twist could be that Peter's real identity as Spider - Man is revealed to Tony in a very unexpected way. Maybe during a fight against a common enemy, Peter's powers malfunction and he has to expose his identity to save Tony. Another could be that Tony's enemies try to use Peter against him once they find out about the adoption. For example, they kidnap Peter to blackmail Tony into giving up some important technology.
Peter would likely have a closer relationship with the Avengers. He'd be like a little brother to some of them. For example, Thor might take him under his wing and teach him about Asgardian lore. And Captain America would be a great role model for Peter in terms of leadership and moral values.
They could have adventures in space. Maybe Peter discovers a new alien threat while on a school trip with his friends. Tony and Pepper, as his adoptive parents, then join forces with the Avengers to help Peter defeat the aliens. This would involve lots of high - tech battles and cool teamwork.
I think Rhodey would be a likely character. He was Tony's close friend, so he would be involved in verifying Peter's claim and guiding him. Also, Aunt May could play an important role. She has raised Peter and now has to come to terms with his new identity. And there could be some other Avengers like Natasha or Clint who knew Tony well and could offer their perspectives on this new family revelation.
Well, it shows that their relationship isn't always smooth. Tony, as a mentor, has a lot of power over Peter, and when he makes Peter cry, it shows that he can also be a source of pain for Peter. It's like a complex father - son relationship where the father figure can sometimes be too strict or make decisions that the son doesn't like.
Often it's their shared intellect. Tony is a genius, and Peter is a brilliant young mind. In fanfiction, this common trait draws them together like magnets. They understand each other's thought processes in a way others can't.
Another characteristic is the exploration of their different powers and skills within the story. Steve's super - strength, Tony's high - tech gadgets and Peter's spider - like abilities are often used in creative ways to overcome obstacles. This can lead to really exciting action sequences.
In fanfiction, Tony being possessive of Peter can be seen as a form of over - protection. Tony, with his genius intellect and resources, might feel the need to safeguard Peter from the dangers of the world. It could also stem from a sense of mentorship and seeing Peter as a younger version of himself that he wants to guide and keep close.