The de - aged Tony could also form a mentor - mentee relationship with a younger Avenger. He has the knowledge and experience of his older self but the energy and fresh perspective of his de - aged self. This relationship could be a key factor in how the story progresses, as he imparts his wisdom in a different way and the younger Avenger helps him see things from a new angle, which could potentially change the course of the Civil War in the fanfiction.
One possible scenario in this fanfiction could be that a de - aged Tony Stark brings a new perspective to the events of Civil War. He might be less jaded and more idealistic, trying to find solutions that the older, more conflicted Stark couldn't see. Maybe he forms unexpected alliances with other characters based on his fresh outlook.
A possible plotline is that the de - aged Peter and Tony have to work together to solve a problem that only their combined knowledge, both from the present and Peter's future - self's knowledge, can fix. For example, they might need to stop a villain who has a time - related weapon that de - aged Peter in the first place. This would involve Peter using his spidey - sense in a different way as a kid and Tony using his tech skills to analyze the weapon and figure out how to reverse its effects not just on Peter but also on any other potential victims.
There's a fanfic called 'De - Aged Stark's New Adventures'. In this story, de - aged Tony forms an unlikely friendship with a young inventor. They work together on projects that could change the world. It's interesting to see how Tony's adult knowledge combines with a child's creativity in this one.
The 'family - like bond' trope is often seen. De - aged Tony forms closer bonds with the people around him, almost like a family. They protect him and he in turn, uses his genius to help them. For instance, he might become like a little brother figure to some characters. And there's also the 'coming - of - age' trope even though he's already an adult. He still has to grow in this new de - aged state, learning new things about himself and the world.
One idea could be that Pepper tries to mediate between Tony and Steve during the Civil War. Since she knows Tony so well, she might be able to find common ground that others can't. Another could be Pepper getting involved in the fight herself, using her business acumen and strategic thinking to help Tony's side. Maybe she discovers a hidden plot that could change the course of the war.
Well, perhaps Tony Stark time - travels during the Civil War to a moment when he first started developing Ultron. He then uses his future self's wisdom to avoid creating Ultron in the first place. This would change the entire dynamic of the Civil War as the destruction caused by Ultron was a major factor in the public's distrust of the Avengers. He could also time - travel to meet a younger version of Captain America and try to understand his point of view better from the start.
One plotline could be Peter struggling with choosing between Tony's side and his own moral compass. Maybe he tries to find a middle ground to keep his relationship with Tony intact while also doing what he believes is right.
Another plot might involve the Avengers trying to figure out how to deal with de - aged Tony and Loki. They could be worried about Loki's intentions since he's usually a villain, but at the same time, they have to take care of a child - like Tony. This creates a lot of comical and tense situations.
One possible plot could be about their journey of self - forgiveness. Maybe they start to realize the mistakes they made during the Civil War. Steve could be feeling guilty for not signing the Sokovia Accords and for how things turned out with Bucky. Tony might feel guilty for his extreme actions against Steve and his friends. They could gradually start to communicate again, perhaps through letters or secret meetings, and slowly work towards rebuilding their friendship.
At first, Tony might be skeptical about the whole situation. But as he sees the de - aged Peter's potential and his spidey - sense in action, he starts to warm up. They could develop a relationship where Tony is constantly protecting Peter from both physical threats and the knowledge of the future that Peter might accidentally reveal. Peter, on the other hand, would be in awe of Tony's intelligence and resources and would try to learn as much as he could from him. Their relationship would be a mix of mentorship, friendship, and a bit of a father - son dynamic.