I think Bruce Banner would be great too. He could share his knowledge of science with Tony's daughter. Despite his 'Hulk' side, he's a gentle soul and could be a good influence. And of course, Wanda Maximoff. She might be able to show Tony's daughter some magic - like powers or at least the concept of using one's mind in extraordinary ways.
Definitely Natasha Romanoff. She's a skilled spy and could train Tony's daughter in espionage skills, or at least how to be observant. Another one would be Clint Barton. He could teach her archery in a fun way. They would have a lot of father - figure - like interactions with her, which would be really heart - warming.
In such a fanfiction, the Avengers might be very protective of Tony's daughter. They could teach her self - defense skills or share their heroic stories with her.
Iron Man and Robert Downey Jr. would likely have interesting interactions. Iron Man is known for his wit and charm, and Downey Jr. has a similar personality. They could exchange some clever banter and perhaps even discuss how Iron Man's character has evolved over the movies.
Definitely Captain America. Their relationship has always been complex and full of different ideologies. Meeting future Tony would be a big moment for Steve as he would see how Tony has changed or what new ideas he brings. Also, Thor would likely interact with him. Thor, with his Asgardian knowledge and power, would be interested in the future technology Tony might bring. And of course, Black Widow. She's the master of espionage and would be curious about Tony's motives and what he's hiding from his future.
One popular type of fanfiction could be about Tony Stark's daughter joining the Avengers. Maybe she inherits his genius and creates her own high - tech suit. She might struggle at first to be accepted by the existing Avengers, like Iron Man did. But through her skills and determination, she gradually wins them over and becomes an important part of the team.
Another idea for this fanfiction could be that Tony Stark's daughter starts as a sort of 'Avengers - in - training'. She is constantly trying to prove herself to the established members. There could be a lot of action - packed scenes where she is in dangerous situations but manages to use her wits and any skills she has learned from her father to get out of them.
Obviously, the daughter herself is a central character. Pepper Potts often appears as she was close to Tony Stark. Happy Hogan might also be there, as he was part of Tony's inner circle. And the Avengers like Captain America, Thor, and Black Widow could show up as they were friends or colleagues of Tony Stark.
Definitely Iron Man and Jessica Jones. Iron Man is all about technology and being in control, while Jessica is more of a rough - around - the - edges detective. Their personalities would clash at first. Tony Stark might try to upgrade Jessica's equipment or give her some high - tech gadgets, but she would probably resist, leading to some really interesting exchanges between them.
Pepper Potts could be a common character. She might be in a position where she tries to mediate between Tony and his unwanted daughter, either trying to get Tony to be more accepting or helping the daughter understand Tony's perspective.
A plotline could be her trying to live up to her father's legacy. Since Tony Stark was such an iconic figure in the Avengers, his daughter might feel a great deal of pressure. She could start off making mistakes but then learn from them and become a better hero. For instance, she might accidentally set off a new weapon she was developing and then find a way to fix the damage and turn it into an advantage against a villain.
Captain America and Peter would also have great interactions. Steve Rogers could teach Peter about the importance of responsibility and leadership. And Peter, with his youthful enthusiasm, could remind Steve of the good in the world and the future.