One interesting fanfiction could be where Captain America and Iron Man have to team up in an alternate universe to fight a new threat that combines their worst enemies' powers. It could explore their relationship in a different setting, highlighting their differences and how they overcome them to save the day.
There are fanfictions that focus on the early days of their relationship in the Avengers. Maybe a story about how Iron Man was initially skeptical of Captain America's old - fashioned values but then grew to respect him as they faced battles together. It could show how their friendship evolved through shared experiences.
One possible storyline could be them realizing their deep emotional connection during a particularly tough battle. They start to rely on each other more than just as comrades, and slowly feelings of love and attraction develop. For example, Iron Man might be injured and Captain America stays by his side constantly, leading to a new level of closeness.
Maybe they get stuck in an alternate universe where they are the only superheroes. They then have to figure out how to get back while also protecting this new world from the villains there. In this situation, they might learn more about each other's values and become closer friends than before.
One interesting storyline could be their ideological clashes. Captain America and Iron Man have different views on things like government control and superhero registration, which leads to intense conflicts within the story.
There is a fanfic named 'Cap and Iron Man: United Front'. In this, they team up against a new and powerful enemy that threatens the whole world. It's full of action scenes and also some heart - to - heart conversations between them that are really well - written.
A third common theme is sacrifice. Fanfictions may depict situations where either Captain America or Iron Man has to sacrifice something for the greater good or for the sake of their relationship. It could be something as simple as sacrificing personal time to train together or as big as sacrificing a chance at personal glory to save the other.
In the comics, Iron Man did not kill Captain America. Their conflicts and battles were part of the storylines, but not to the extent of one killing the other. The relationship between them was complex but not fatal.
In the comics, Iron Man doesn't end up killing Captain America. Their battles and disputes have various outcomes, but not one that involves a fatal blow from Iron Man.
Yes, in some storylines, Iron Man has come out on top in their battles.
Yes, Iron Man 1 did have the image of Captain America's shield.
One common theme is the resolution of their differences. Since they had major conflicts in the movies, fanfic might use a kiss as a way to show them making up. Another theme could be the exploration of a hidden or suppressed love. Maybe in the story, they realize they have deeper feelings for each other that they've been ignoring.