Love and friendship is a common theme in fanfics. In this case, it could be about how an unlikely pair like the futa and female Bruce Banner form a deep connection. It might start as a friendship based on mutual respect for each other's abilities, and then gradually develop into something more like love, which changes their lives and the way they view the world.
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.
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.
Since Bruce is often associated with heroism in many contexts, one common theme might be the futa character being inspired by Bruce's heroic deeds and then a relationship budding from there. Another could be the exploration of their different personalities and how they complement or clash with each other, leading to an interesting dynamic in the fanfic.
There are also fanfics that focus on the scientific aspect. Since Bruce is a scientist, the reader might be his assistant or a fellow scientist, and they explore scientific mysteries together while their relationship grows on the side.
One common theme is the exploration of femininity in a scientific and superhero context. Since Bruce Banner is known for his scientific genius, a female version might face different challenges or opportunities in the scientific world. Another theme could be relationships. How would a female Bruce Banner interact with the other Avengers? Would her relationships be different from the male version? For example, romantic relationships might be portrayed in a new light.
One common theme is the discovery of self - worth. The OC often helps Bruce see his own value beyond his Hulk side. For example, in many stories, the OC encourages Bruce to pursue his scientific interests without fear.
One common theme is acceptance. Since Bruce has his Hulk side, a lot of fanfictions focus on the reader accepting all of him, both the brilliant scientist and the powerful Hulk. For example, stories might show the reader helping Bruce come to terms with his dual nature.
Another theme is the idea of them finding support in each other. In many fanfics, Bruce might find comfort in Darcy's straightforwardness, and Darcy could be inspired by Bruce's scientific genius. It's about how they can complement each other in various ways.
One common theme is friendship. Given that they are both part of the Avengers, many fanfics focus on how they bond and support each other. Another theme is redemption. For example, if Bruce has an 'Hulk - out' incident that causes problems, Clint might be the one to help him through it.
One great 'Bruce Banner x Tony Stark' fanfic is 'The Scientific Bond'. It beautifully explores their intellectual connection. They start off as colleagues with mutual respect for each other's scientific minds. As the story progresses, they face challenges together in the lab and outside. Their relationship deepens as they rely on each other more and more. Another interesting one is 'Beyond the Armors and the Hulks' which delves into their emotional sides, showing how they support each other during difficult times.
One possible title could be 'The Iron and the Hulk: A Stark - Banner Alliance'.