The Avengers would also have to adjust. They've come to rely on Iron Man's technology and his combat skills. His departure could create a power vacuum within the team. For instance, they might struggle to come up with new strategies in battles without his innovative thinking. And his friends like Rhodey and Happy would be worried about him, wondering if he's made the right decision.
On the other hand, some might see it as an opportunity for new heroes to emerge. Maybe young inventors and people with powers would step up, inspired by Tony Stark's previous actions as Iron Man. The world could start to look for different ways to defend itself and develop new technologies that were previously overshadowed by Iron Man's presence.
Maybe he realizes that the cost of being Iron Man is too high. His suits are constantly damaged, and he has to deal with numerous enemies. This could lead to him quitting in the fanfiction to avoid further harm to himself and those around him. For example, his suits might put Pepper Potts in danger, so he decides to stop.
Tony Stark would likely be extremely worried and protective. He'd probably drop everything he was doing to be by Pepper's side, using all his resources and technology to ensure she gets the best medical care. He might also feel guilty, thinking that his Iron Man activities put her in danger.
First, you need to understand Tony Stark's character really well. Read the comics, watch the movies. Then, create an interesting original character (OC). Give your OC a unique backstory, personality traits that can interact well with Tony Stark's. Also, come up with a good plot. It could be something like your OC helping Tony Stark in a new technological project or facing a common enemy together.
Natasha Romanoff would be disappointed. She values the unity among the Avengers and sees Tony and Steve as important pillars of that unity. She might try to mediate at first, but if the divorce is inevitable, she'd be sad to see the team's dynamic change so drastically.
Well, it all started when Tony was kidnapped and forced to build weapons. He then built a suit to escape and decided to use his tech for good, becoming Iron Man.
Tony Stark became Iron Man after being kidnapped and forced to build weapons. He created a suit to escape and decided to use his technology for good.
Tony Stark became Iron Man after being kidnapped by terrorists. While captive, he was forced to build a weapon. Instead, he created a suit of armor to escape. This was the first version of the Iron Man suit.
Tony Stark became Iron Man when he was captured by terrorists. He was forced to build a weapon for them but instead, using his brilliant mind and the limited resources available in the cave where he was held, he built a suit of armor to escape. This was the first prototype of the Iron Man suit.
Steve Rogers would probably be deeply disappointed. He values loyalty highly, and Tony's betrayal would shatter the trust they had. He would try to find out the reasons behind it and might even try to bring Tony back to the right path if he thought there was a chance.
There would be a group of people who understand his decision. They might have seen how much Naruto has sacrificed and how tired he must be. They would support him in his choice to step down and hope he can finally have some peace in his life. For instance, his close friends like Shikamaru might be among those who support his decision.