In the world of fanfiction, the idea of Iron Man killing Captain America can be quite controversial. Ethically, it goes against the typical heroic and friendly relationship they have in the mainstream Marvel universe. However, fanfiction is a space for exploring different scenarios, so while it may seem unethical to some, it can be a creative exploration for others.
There are indeed. In some fanfics, the Avengers' reactions can be quite humorous. They might make jokes about Tony's self - destructing suits or his attempts at flirting. Other fanfics might take a more serious approach and look at how the events of 'Iron Man 3' affect the Avengers' relationships with Tony and each other, like how it could create trust issues or bring them closer together.
Some characters might be offended. If the fanfiction distorts their personalities too much. For example, if it makes Happy Hogan seem cowardly when he is actually brave in the original story. He might not like this misrepresentation at all. However, others like Nick Fury might just take it in stride and see it as part of the popularity of the Iron Man franchise.
Yes, it is quite a popular trope in some parts of the fandom. Some fans enjoy exploring the deep bond between Captain America and Iron Man in this way, seeing it as an expression of their strong friendship or a different kind of relationship. It often shows up in fan - created works, including fanfics and fan art.
Captain America would likely try to be the voice of reason. He'd approach Tony with empathy, trying to understand what's going on in his head and find a way to bring him back to his senses. He might also try to keep the other Avengers calm and focused on helping Tony rather than seeing him as a threat immediately.
Perhaps he freezes for a moment. The shock of seeing Pepper pass out might be so great that he's initially stunned. But then he quickly regains his composure and uses his scientific knowledge and resources to figure out what's wrong and how to help her.
They could get emotional. Iron Man has been through a lot, and a fanfic might explore his emotional journey in more depth. The Avengers, who have fought alongside him, would likely be affected by this. They might remember the times they shared with him, the battles they fought together, and this could strengthen their bond as a team, even if it's just based on the fanfic's version of his story.
The Avengers would likely be filled with rage. Captain America, for instance, would immediately charge at Thanos, not caring about the danger. His sense of justice and loyalty to his friend would drive him to seek revenge right away.