The plot could also develop around Natasha proving herself without Tony's help. She could take on solo missions that are so successful that they start to make Tony question his initial decision not to hire her, gradually building up to a possible change in his attitude in the long run.
Perhaps it causes a rift in the superhero community. Some might side with Tony's decision, while others might see it as a mistake. This could create tension and different factions within the community, leading to various sub - plots and conflicts.
It could be that Tony Stark already has a full team with specific skill sets that he believes don't need Natasha's skills at the moment. He might be focused on tech - based heroes or those with superpowers that are more in line with his current projects.
One possible reason could be that Tony has some pre - existing biases. Maybe he has a set idea of the type of person he wants on his team and Natasha doesn't fit that mold in his mind. For example, if he's looking for someone with a more technical background and Natasha's skills seem more combat - oriented to him at first glance.
One idea could be a story where they discover their sibling bond in a rather unexpected way. Maybe they both get kidnapped by a common enemy who reveals the truth about their relation. They then have to work together to escape and along the way, they share memories from their past that they didn't know were connected. For example, they might find out that they both had a favorite hiding spot as children in two different locations that were actually part of the same secret family place.
One great 'Tony Stark and Natasha Romanoff fanfiction' is 'The Unlikely Alliance'. It explores their relationship in a post - apocalyptic world where they have to rely on each other's skills to survive. Their banter and the way they gradually come to understand and respect one another is really engaging.
Natasha could also be disappointed but determined. She might see this as a setback but use it as motivation to prove herself elsewhere. For example, she could go and work for one of Tony's competitors and become very successful there, just to show Tony what he missed out on. She could also try to improve her skills or image to make herself more appealing in the future.
One idea could be that they discover they are siblings during a big battle. Maybe they both have a similar power or technology that leads them to figure it out. For example, they find out they have the same kind of energy source in their suits or weapons that was passed down from their parents. Another plot could involve them working together to uncover the secrets of their family's past. They might travel to different places, like an old family mansion or a secret research facility their parents were involved in.
Well, one possible plot could be that they discover they are siblings in a dramatic moment during a big battle. Then they have to figure out how to work together as family while still dealing with the threats against the world.
One idea could be a story where Tony and Natasha have to go undercover as a couple on a mission. They start to develop real feelings during the process. For example, they might have to attend a high - society event and deal with all the pretenses while also trying to uncover a hidden enemy. Another plot could be set in a post - apocalyptic world where they are two of the few survivors and have to rely on each other completely to stay alive and rebuild society. Or perhaps a story where they both get trapped in a virtual reality world created by an enemy and have to find a way out together while also facing their own inner demons.
Yes, there are likely fanfictions with this premise. Fanfiction writers often come up with creative and unexpected relationships between characters. They might explore how Natasha and Tony's relationship would be different if they were siblings, and how it could impact the events in the Marvel universe.
One challenge is getting their personalities right. Tony is a brilliant but often egotistical tech - genius, while Natasha is a highly trained and mysterious spy. It's hard to make sure their interactions are in line with their established characters. Another challenge is creating a believable relationship between them. Given their different backgrounds and roles in the Avengers, it's not easy to write a smooth transition from colleagues to something more. Also, coming up with original plot ideas that haven't been overdone in the already large pool of fanfiction can be difficult.