Well, if Spider - Man died in a Civil War fanfiction, it could be that his death serves as a catalyst for the end of the war. His death might make both sides realize how pointless their fighting is. Maybe the heroes would then come together to honor his memory and try to make amends. His friends in the superhero community, like Ned if he knew about Peter's identity, would be heartbroken. And villains might take advantage of the situation, thinking the heroes are weakened without Spider - Man, which could lead to new threats emerging in the fanfiction world.
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.
In some fanfictions, Spiderman might die due to a miscalculation in his powers during the battle in Civil War. Maybe he tries to overextend himself to protect civilians or other heroes and gets caught in a cross - fire that his body can't withstand.
There are a few significant deaths. One of them is Goliath, who is tragically killed during the battle. Also, some minor characters lose their lives, but their impact is relatively smaller compared to major ones.
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.