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.
A more complex idea would be a crossover where the Hulk's power is affected by the magic in the Harry Potter universe. Maybe the Hulk becomes a different kind of creature when exposed to certain spells or magical artifacts. This could lead to a whole new set of adventures for both Bruce Banner and the characters in the Harry Potter series as they try to figure out how to control or deal with this new version of the Hulk.
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.
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.
One idea could be a story where a Wendigo somehow enters the wizarding world of Harry Potter. Maybe it's brought in by a dark wizard who wants to use it as a weapon. The Trio - Harry, Ron, and Hermione - would then have to figure out how to defeat it using their magic and knowledge.
One idea could be that Hulk somehow gets transported into the wizarding world of Harry Potter. Maybe a magical experiment gone wrong by a Hogwarts student creates a portal that sucks Hulk in. He could then cause chaos as he's not used to the magic and strange creatures there.
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.
Maybe Fem Harry Potter is on a quest to find a magical object that has found its way into the Marvel world. Bruce Banner, in his Hulk form, initially scares her but then they realize they can help each other. The Hulk's strength could be useful in protecting Harry from physical threats while she uses her magic to protect Banner from magical ones.
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.
Perhaps in a fanfiction, Bruce Banner discovers a new form of science that can enhance Thor's powers even more. Thor, in turn, helps Bruce understand the Asgardian view of the universe, which gives Bruce new insights into his own work. This could lead to a series of events where they team up against a common enemy that is a threat to both Earth and Asgard.