First, you need to decide on the basic plot. Will it be a story where they meet in one of their worlds, or will it be a new world entirely? Then, think about how their personalities will interact. Bruce is a brilliant scientist with a temper problem, while Harry is a brave and determined wizard. You can create interesting scenes based on their different skills and mindsets. For instance, Bruce could use his scientific knowledge to analyze a magical phenomenon, and Harry could use magic to protect Bruce from danger.
Another fanfic concept could involve Harry Potter somehow ending up in Bruce Banner's world. He might be there to learn about modern Muggle technology and end up meeting Bruce. Together, they could face a threat that requires both magic and scientific knowledge to defeat. For example, a villain who is using both dark magic and advanced technology to cause chaos.
The unique aspect is the combination of two very different worlds. Harry Potter's world is full of magic, wands, and spells, while Bruce Banner's world is about science and the struggle with the Hulk. In the fanfic, we see how these two elements can co - exist, like how Banner's scientific mind might view magic, or how magic could potentially be used to control the Hulk.
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.
Perhaps Bruce Banner adopts Harry Potter after the events at Hogwarts. He takes Harry to the world of science, showing him things like advanced laboratories and scientific research. Harry, in turn, shows Bruce the wonders of magic. Their bond grows as they learn from each other, and together they face new threats that combine elements of both the magical and scientific worlds.
The plot could start with Bruce Banner somehow ending up in the wizarding world. Maybe a scientific experiment goes wrong and creates a portal. Once there, he meets Harry Potter. They initially have some misunderstandings due to their different backgrounds, but soon realize they can help each other. The main plot could revolve around a new threat to the wizarding world that requires both Banner's scientific knowledge and Potter's magic to defeat.
There's a fanfic where Bruce Banner is a visiting scientist at Hogwarts. In the story, his scientific knowledge clashes and also meshes with the magic of the wizarding world. It shows how the two different forms of knowledge, Muggle science and magic, can interact. This 'Harry Potter Bruce Banner fanfic' is really thought - provoking and gives a fresh take on both universes.
In fanfiction, Bruce Banner could save Harry Potter through his scientific knowledge as well as the Hulk's powers. Maybe there's a situation where a magical curse is spreading uncontrollably. Bruce, in his normal state, could analyze the curse using his scientific expertise and figure out a way to stop it. And if there are any physical manifestations of the curse that need to be dealt with, the Hulk could step in and use his strength to destroy or contain them. This would show a great combination of the scientific and magical elements in the story.
I really liked a fanfic where fem Harry Potter accidentally travels to Bruce Banner's world. It shows how she tries to adapt to this new world full of science and technology, which is so different from the magical world she's used to. And Bruce Banner is intrigued by her magic. It's a great exploration of two very different characters coming together.
One idea could be that Bruce Banner is somehow transported to the wizarding world of Harry Potter. Maybe he arrives during a time of great danger, like when Voldemort is at his most powerful. Bruce's scientific knowledge could be combined with magic in unexpected ways. For example, his understanding of gamma radiation might interact with some of the more dangerous magical spells or potions. He could also form an unlikely friendship with Harry Potter. Harry could teach him about magic, while Bruce could show Harry some of the scientific concepts from his world.