If Thor finds out about Civil War fanfiction, he may also start to question the nature of reality and how Midgardians perceive the events that happened. He might wonder why they would create these alternate stories. He could even get interested in the creative process behind fanfiction and start to think about how his own stories could be told in different ways. This could lead to him interacting more with the creative community on Earth, or at least being more aware of their existence.
He'd probably be shocked. Fanfiction is not something he's used to in Asgard. He might raise an eyebrow and say something like 'What is this strange Midgardian creation?'
In some Civil War fanfictions, Tony might die due to a malfunction in his suit during a battle. Maybe an enemy manages to hack into it and cause a critical system failure that leads to an explosion.
The theme of sacrifice is also quite prominent. Tony might have to sacrifice some of his ideals or relationships for the greater good in the Civil War context, and Pepper might have to sacrifice her own wants and needs to support Tony. Also, the theme of trust is there. They need to trust each other even when things are falling apart around them in the war.
Conflict of ideals is also a major theme. Natasha and Tony have different views on things like superhero registration. In fanfictions, this often leads to intense arguments and moments of self - reflection as they both try to justify their stances and understand the other's point of view.
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.
Well, in certain Civil War fanfictions, Tony could win the fight because of his strategic mind. He might analyze his opponent's weaknesses beforehand and plan his attacks accordingly. For example, if he's fighting someone with brute strength but less intelligence in combat, he'd use his environment and his suit's gadgets to outwit them. He could also call in some backup or allies that are part of his side in the civil war, which could turn the tide of the fight in his favor.
One common theme is redemption. After the events of Civil War, Tony often has to deal with the consequences of his actions, and many fanfictions explore his journey towards redemption, either within his team or in the eyes of the public. Another theme is rebuilding. His team might be fractured, so stories often revolve around rebuilding relationships and trust.
One consequence could be that the Avengers are left in disarray. Tony was a key figure in terms of resources and technology. His death might mean a lack of funding and advanced equipment for the team.