Steve Rogers' old comrades from the Howling Commandos might show up. They were close to Peggy and would surely be there to pay their respects.
Sharon Carter could be there. Since she was Peggy's niece, it would be natural for her to be at the funeral. And her presence might create an interesting dynamic with Tony, as they both have different connections to Peggy and the world of superheroes.
In this fanfiction, Tony at Peggy's funeral could be a moment of self - discovery for him. He might be surrounded by the reminders of a bygone era. As he stands there, he could be thinking about how Peggy's life and values are still relevant. He may even have an internal dialogue about how he can incorporate some of those values into his own actions moving forward. There could also be some tension if there are people at the funeral who don't quite trust Stark, and he has to deal with that while still showing his respect for Peggy.
Tony Stark was not one to be overly sentimental, but Aunt Peggy's funeral was different. As he entered the church, memories of the old tales of Peggy Carter flooded his mind. He remembered her as a symbol of strength and resilience. During the service, he couldn't help but think about how she was part of a generation that had laid the foundation for his own heroics. He knew that her legacy would continue to inspire him in his battles against evil.
Tony Stark could be involved in Aunt Peggy's funeral as a guest paying his respects. He might have heard stories about her from Steve Rogers and felt a sense of admiration for her. So he comes to the funeral to honor her and the legacy she left behind.
Pepper Potts would most likely be there. She often supports Tony in his public appearances. Also, Happy Hogan might be present to ensure security. And of course, there could be other Avengers like Captain America or Thor. They might show up to show their support for Tony or to be part of the announcement if it concerns the whole team.
In some fanfictions, there could be creative interpretations where Peggy Carter is somehow related to being Tony Stark's mom. However, in the official Marvel canon, Howard Stark is Tony's father and Maria Stark is his mother.
He would surely meet Black Panther. As the king of Wakanda, Black Panther would be the first and most important person Tony Stark would encounter.
It could be Rhodey. As Tony's long - time friend and fellow Avenger, Rhodey would be eager to see him and would likely be among the first to be informed of his return.
In this fanfiction, Tony might also meet Loki. Loki could be either a friend or a foe to Tony. He might try to trick Tony for his own amusement or they could end up working together against a common threat to Asgard.
There could be some young and brilliant inventors like Peter Parker. His fresh ideas and quick thinking would be an asset to the team.
Pepper Potts. She is very close to Tony and knows him well. She might notice some strange behavior or small signs that lead her to suspect he has hidden powers. For example, he might unconsciously use his powers in a moment of stress or danger when he thinks no one is looking.