Natasha could also be greatly affected. She is perceptive and if she reads Tony's thoughts, she might use that knowledge to manipulate situations within the team for the better or worse. Maybe she discovers Tony's concerns about a potential threat and uses her skills to help address it.
One interesting scenario could be that the Avengers find out about Tony's insecurities regarding his role in the team. They might then be more understanding and supportive, changing the dynamics within the group.
In fanfiction, if the Avengers read Tony's file, it might vary greatly depending on the plot of that particular fic. They could be shocked by what they find. For example, if there were details about his family history or his true motives behind some of his actions. This could either strengthen their bond or create a rift. If the file contained information about a new technology he was working on secretly, it could lead to different reactions. Some might be excited, while others might be worried about the implications.
In many Avengers fanfictions where Tony dies, it's often a heart - wrenching scenario. One common plot is that he sacrifices himself heroically to save the world one last time, much like in the movies. His death leaves a huge void in the Avengers team, and his friends are left to deal with the grief and the aftermath. It makes for some very emotional and poignant stories as his character was so central to the Avengers' narrative.
He could also become more defiant. Instead of trying to win back their favor, he might double - down on his actions and beliefs. For instance, if they hate him for his use of a particular technology, he might continue to develop it just to prove them wrong.
I think this kind of fanfic can be quite controversial. In the Avengers universe, Steve and Tony have a complex relationship, and adding such a plot of 'cheating' with Bucky can change the whole dynamic. Some fans might like it for the drama it creates, but others might feel it goes against the original spirit of the characters' relationships.
Tony would probably be really hurt. He's a human after all, despite being a genius billionaire playboy philanthropist. Birthdays are special, and for his friends to forget would sting.
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.
Maybe they suspect he's hiding something important. So they decide to read his file to find out the truth.
Tony Stark's injuries in fanfiction can have a huge impact on the story. If he's physically injured, it might force him to rely on other Avengers more, which could change the team dynamics. For instance, he might have to trust Steve Rogers completely when it comes to leading the team in his absence.
Tony's death in Avengers fanfiction can be portrayed in various ways. Sometimes it's a slow and painful death due to radiation exposure from his arc reactor. This gives the other characters time to interact with him in his final days, and there are a lot of emotional goodbyes. It also shows his strength as he endures the pain while still trying to offer advice to his friends.