Common themes often revolve around the idea of a deeper connection. In the source material, they have a complex relationship that goes through many stages. In fanfic, a kiss can be a manifestation of that relationship evolving into something more intimate. There could be themes of sacrifice as well. Maybe one of them is willing to sacrifice something important for the other, and the kiss is a moment of realization of that. Another theme is the breaking of boundaries. They are two male heroes, and in fanfic, the kiss can break the traditional boundaries of male - male relationships in superhero stories, exploring new territories of love and friendship.
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.
One common theme is redemption. After their big fallout, many fanfics focus on how they can redeem themselves in each other's eyes. For example, they might save each other from dangerous situations.
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.
The theme of sacrifice also pops up. Their relationship is such that they might be willing to sacrifice themselves or their own interests for the sake of the other. This could be in the face of a powerful enemy or a difficult decision that has to be made for the greater good.
Power and responsibility is also a theme. Both Captain America and Iron Man have different views on how to use their power. Fanfictions often play with these ideas, showing how they might influence each other or find a middle ground. For example, some stories might have them debating about the best way to protect the world.
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.
One common theme is loyalty. Writers often explore how the members of Team Iron Man are loyal to Tony Stark and his vision for the Avengers. They show how this loyalty drives their actions during the civil war.
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.
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.
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.