Well, it could be that Natasha learns about Tony's true nature in terms of his self - sacrifice. Tony often acts like a self - centered billionaire, but in reality, he is willing to put everything on the line for the greater good. Natasha might come to see this when they are in a tough situation together, like facing a powerful enemy where Tony's first thought is about saving the world rather than his own interests.
One possible plot could be that Natasha discovers Tony's true nature regarding his relationships. He might seem to have a lot of casual flings, but in fact, he deeply desires a real and meaningful connection. Natasha, with her perceptive skills, might notice this when she observes his interactions with Pepper or other people close to him. She could then start to see him in a new light, understanding that his playboy image is just a cover - up for his longing for true love.
Natasha may come to view Tony as a kindred spirit. If she discovers that he also has a longing for real connection like she does, she'll feel a sense of kinship. His true nature might show that he is not as different from her as she initially thought. They could then develop a closer friendship or even something more, as they realize they share common emotional ground beneath their outward appearances.
One possible plot could be that Tony and Natasha reunite in heaven. They might look back on their time on Earth, the battles they fought together. They could share their regrets, like Natasha might regret not being able to do more for the world before her sacrifice, and Tony might regret some of the decisions he made during the various conflicts. They then start to explore heaven together, meeting old friends who also passed away and reminiscing about their shared memories.
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 possible plot twist could be Natasha taking on Tony's role as the tech - savvy billionaire. She might use her combat skills and spy training in a new way to handle Stark Industries. For example, she could turn the company's focus more towards creating defensive technologies for the world's most vulnerable areas. Another twist could be Tony in Natasha's role. He'd have to rely more on his wits and physical abilities rather than his high - tech gadgets. He might struggle at first but then find new ways to outsmart his enemies using his intelligence in a more hands - on way.
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.
It could be a new villain that we haven't seen in the original Marvel universe. This villain might be able to manipulate Natasha's emotions and loyalty, making her betray Tony. For example, a powerful sorcerer who uses dark magic to control her.
Maybe an old enemy from their time on Earth who somehow managed to get into heaven. This enemy could hold a grudge against both of them and wants to take revenge. They might use their knowledge of Tony and Natasha's past weaknesses to try and defeat them in heaven, where the rules are different from Earth.
Another theme is teamwork. They are both part of the Avengers, so many fanfictions focus on how they work together on missions, whether it's fighting a new villain or rescuing hostages. Their different skills - Tony's technology and Natasha's espionage abilities - make for interesting team - up scenarios.
One possible plot point could be Natasha's stealthy approach to the Siberian location where Tony is in trouble. Maybe she has to evade guards or overcome various obstacles to reach him in time.
One possible plot could be that Peter grows up with Natasha's skills and values. He might be trained by her in combat and espionage. For example, he could learn how to use different weapons and how to deceive enemies just like Natasha. Maybe they go on secret missions together, with Peter gradually proving himself as a worthy heir to Natasha's abilities.