Another possibility is that it's a more emotional and character - driven story. The futa could be someone who helps the female Bruce Banner come to terms with her own identity. Since Bruce Banner has always had issues with his dual identity as himself and the Hulk, as a female in this fanfic, she might face different challenges. The futa could be the one to support her, understand her, and through their relationship, the female Bruce Banner grows as a person.
Power dynamics could be another theme. The futa may have certain powers, and female Bruce Banner also has her own power in the form of the Hulk or her scientific genius. How they balance these powers between them, whether they compete or cooperate when it comes to power, can be a major part of the story.
A fanfic about Bruce Banner and Harry Potter could be really interesting. Maybe Bruce Banner could be a wizard who has the Hulk - like abilities as a magical manifestation. He could use his strength to protect Hogwarts from dark forces, like Voldemort's followers. It could also explore how the scientific mind of Banner would interact with the magical world of Harry Potter, perhaps he tries to find a scientific explanation for magic.
One idea could be a story where Bruce and Natasha are on a mission together in a remote location. They have to rely on each other's skills to survive. Bruce uses his scientific knowledge to figure out a way to stop a dangerous experiment gone wrong while Natasha uses her combat skills to protect them from the threats around. Their relationship gradually deepens as they face challenges side by side.
In a 'bruce banner death fanfic', it could be that Banner is tricked by a powerful villain into believing that his continued existence is a threat to all of humanity. Depressed and believing he has no other option, he takes his own life. This could lead to a complex exploration of the ethics of superheroes and the power they hold, as well as the impact of Banner's death on his friends and the world at large.
The plot could involve Peter exploring his father's scientific research. Since Bruce is a brilliant scientist, Peter might be intrigued by his work on gamma radiation. He could get into trouble by trying to recreate some of his father's experiments without proper supervision, leading to unexpected and dangerous results.
One possible plot could be that they are brought together to solve a mystery that combines magic and science. Maybe a powerful artifact has been found that is both magically and scientifically complex, and their combined knowledge is needed to figure out how to handle it safely.
Maybe it's an old enemy of the Avengers who realizes that by taking out Bruce Banner, they can severely weaken the team. They could use mind - control or some other devious means to drive Banner to a point of no return, leading to his death. So this long - standing enemy of the Avengers could be the main antagonist in the fanfic.
Bruce Banner fanfic, when not involving inappropriate content, usually has a strong focus on his internal conflict. He is a man of science who has been burdened with this uncontrollable alter - ego. Fanfics can show his attempts to find a cure or at least better manage the Hulk. In addition, his relationships within the Avengers can be a central aspect, whether it's his mentorship of Peter Parker or his camaraderie with Steve Rogers.
The plot could involve them working together on a new super - technology. For example, they might try to create a device that can control the Hulk's power more precisely, leading to all kinds of adventures and challenges along the way.
Well, perhaps the child could be in danger from some sort of scientific experiment gone wrong. Bruce, using his Hulk powers, could smash through barriers to reach the child. He might have to fight off some other mutated creatures along the way.