Yes, there are quite a few out there. Some explore how Bucky, as Tony's father, would change the entire MCU storyline. It could lead to very different character dynamics, like a more complex relationship between Steve and Tony considering Bucky's new role.
The fact that Bucky is Tony's father in this fanfic would have a huge impact on Tony's character development. Tony might be more empathetic towards Bucky's situation as a victim of Hydra. Bucky could have taught Tony about his past, including the history of Hydra and the super - soldier serum. This knowledge could have made Tony more cautious in his dealings with the military and other powerful organizations. It could also lead to a different kind of Iron Man suit, perhaps one that was more focused on stealth and infiltration, skills that Bucky would have been familiar with.
It could be a family life full of contrasts. Bucky, who has a more somber and battle - hardened personality, and Tony, who is often flamboyant and quick - witted. But Bucky would likely encourage Tony's intelligence and creativity. They might spend time in the workshop together, with Bucky offering practical advice based on his own experiences in the field. And on family outings, Bucky would be the watchful guardian, always on the lookout for any potential threats to his son.
One common plot point is the revelation of the relationship. It usually shakes up the whole Marvel universe in the fanfiction. Another is how Tony and Bucky deal with this new family tie. They might start off in disbelief or even hostility before coming to terms with it.
One common theme is redemption. Bucky has a complex past and Tony often has to come to terms with that. Another theme is friendship. They are two very different characters but in fanfic they often find common ground and become friends.
One possible scenario in this fanfic could be that Bucky and Steve notice Tony is overworking. So they start by making sure he eats regularly. Steve might cook his old - fashioned but hearty meals, while Bucky keeps Tony company during meal times to make sure he actually eats. They also likely limit his access to the workshop for a while, to force him to rest. Maybe they set up a little relaxation area in Tony's living quarters with comfortable chairs and soft music.
Healing is another common theme. Both characters usually have their own emotional wounds. In these fanfics, through their relationship of adoption, they help each other heal. For example, Bucky's stability can help Tony deal with his insecurities, and Tony's intelligence and humor can help Bucky come to terms with his past.
The theme of friendship also runs strong. As Bucky protects Tony, they start to form a bond that goes beyond just protection. They become friends who support each other through various difficulties. Additionally, there's often the theme of sacrifice. Bucky is willing to put himself in harm's way to protect Tony, showing his selfless side.
One great 'Bucky x Tony Tony nightmare' fanfiction is 'The Broken Alliance'. It delves deep into the complex relationship between Bucky and Tony. In this story, a nightmare situation forces them to confront their past differences and work together. The character development is really well - done, showing how they grow from being at odds to understanding each other on a deeper level.
One common theme is the exploration of identity. Since Tony is female in these fanfics, it often delves into how this change affects her relationship with Bucky and her place in the Marvel universe. Another theme is redemption. Bucky, with his complex past, often goes through a journey of redeeming himself in the eyes of fem - Tony.