One interesting plot could be the daughter suddenly showing up at Stark Tower. She might have grown up in secret, perhaps because her mother wanted to protect her from the dangerous world that Tony Stark is often involved in. She then has to navigate her newfound relationship with her father and all the high - tech and superhero craziness that comes with it.
A third plot might involve the daughter being from the future. She comes back in time to prevent a disaster that she knows will happen because of Tony's actions. Along the way, she has to convince Tony that she is his daughter and get him to trust her, all while trying to change the course of events.
Another plot could be that the daughter has some unique powers or abilities. Maybe she was experimented on without Tony's knowledge when she was a baby. In the fanfiction, she could be using these powers to help or, at times, conflict with Tony and his Avengers friends as she tries to figure out her place in the world.
Well, one possible plot could be the daughter trying to prove herself to Tony despite his initial rejection. Maybe she has some amazing scientific skills that she uses to solve a big problem, and in the process, she starts to earn his respect.
One possible plot could be Tony Stark, as a female, facing the same challenges in the tech world but with added sexism to overcome. She might have to prove herself even more than her male counterpart did. Another could be a female Tony Stark in a romantic relationship with a different character, like Thor, and how that changes the dynamics of the Avengers. Also, she could use her femininity in unique ways to solve problems, for example, using charm and guile where the male Tony might have used brute force or pure intellect.
One plot could be that a powerful enemy kidnaps Tony Stark to steal his Iron Man technology. They hold him in a secret lair and try to force him to reveal all the secrets of his suits. Another could be a fan with an extreme obsession who kidnaps him, thinking they can make him see things their way. Maybe they want him to create a special weapon just for them.
Another plotline could involve the daughter dealing with the legacy of being Tony Stark's child. She could face pressure from the public and other superheroes, while also trying to carve out her own identity. She might struggle with living up to her father's reputation or trying to break free from it.
There could be a fanfiction where Tony Stark's daughter has to deal with the pressure of living up to her father's legacy. In this story, she might struggle with school and friendships because everyone expects her to be as brilliant as her dad. But in the end, she finds her own path and uses her intelligence in a different but equally amazing way.
One interesting plotline could be her inheriting Stark Industries and facing the challenges of living up to her father's legacy. She might have to deal with rival companies trying to take over while also trying to innovate in her own way.
She can be developed through her relationships. For example, her relationship with Tony could start off rocky as they get to know each other. She might be angry at him for not being there during her childhood. As they interact more, she could learn about his good intentions and they could grow closer.
Another plot could be that in a post - apocalyptic world that combines elements of both universes, Harry and Tony are the last hopes for survival. Harry uses his magic to fend off dark magical creatures, while Tony uses his tech to combat advanced technological threats. They must learn to trust each other completely to save both the wizarding and non - wizarding parts of this new world.
One interesting plot could be the challenges they face in a world that is not used to male pregnancy. They might have to deal with public reactions, both positive and negative. Another plot could be how they support each other through the physical and emotional changes that come with pregnancy.
One interesting plotline could be the adopted daughter developing her own unique suit under Tony Stark's guidance. It shows her growth and the bond between them as she learns from the genius.