A creative plot could be that Tony Stark discovers he has a connection to Harry Potter's father through some ancient magic - tech link. Maybe they were both part of a secret society in the past. Another is that Stark's tech somehow brings Harry's father back to life, and they have to work together to protect Harry from new threats in both the wizarding and non - wizarding worlds.
One creative plot could be that Tony Stark travels back in time and teams up with a younger version of himself. They combine their knowledge to fix a major event that had far - reaching negative consequences. For example, preventing the initial release of a dangerous alien technology on Earth. Another could be that he goes back to key points in the history of the Avengers and makes small changes that lead to a more harmonious and effective team from the start, like ensuring better communication between members. And yet another might be that he uses time travel to steal technology from the future's enemies and bring it back to give the heroes an edge in their present battles.
There's a fanfiction where the Hogwarts houses are reimagined as different species from 'Ben 10'. So, Gryffindor might be like the Pyronites (the fire - based aliens in 'Ben 10'), known for their courage. Slytherin could be related to the Ectonurites (the ghost - like aliens), representing their sly nature. This reimagining creates a whole new dynamic within the Hogwarts world and also allows for some interesting interactions between the 'Ben 10' and 'Harry Potter' elements.
There are quite a few out there. In some fanfictions, Tony Stark, with his genius intellect, tries to solve the mysteries of the wizarding world that Harry Potter's father was a part of. It often involves Stark mentoring Harry, sharing his knowledge of science and engineering, while Harry teaches Stark about magic. A popular one has Stark building a magical - tech interface that helps Harry defeat Voldemort more easily.
Another plot could be that in a post - apocalyptic world that combines elements of both universes, Harry and Tony are the last hopes for survival. Harry uses his magic to fend off dark magical creatures, while Tony uses his tech to combat advanced technological threats. They must learn to trust each other completely to save both the wizarding and non - wizarding parts of this new world.
One popular trope is the 'fish out of water' where Tony Stark is suddenly in the magical world of Harry Potter and has to adapt. Another is the 'team - up' trope, where they join forces to fight a common enemy, like a dark wizard using technology in a bad way.
At the start, Tony could be a bit skeptical of Harry's abilities. But when Harry shows off a spell, like making a Patronus, Tony would be impressed. They would then start to work together. Harry could use his magic to help Tony get into places that are otherwise inaccessible, and Tony could provide Harry with some cool gadgets. For example, Tony could give Harry a device that helps him communicate with the wizarding world more easily. They would learn from each other and form an unlikely friendship.
It depends on the situation. In the wizarding world, Harry Potter would be more powerful as he can use magic which is a fundamental part of that universe. He can cast spells to defeat enemies, protect himself and others, and manipulate the environment around him.
In fanfiction that combines Harry Potter and Tony Stark, 'petal' could potentially be used in a variety of ways. It might be part of a magical plant in the Harry Potter aspect, like a petal from a rare flower used in a potion. In relation to Tony Stark, perhaps it could be part of a new technology he's developing that has an aesthetic inspired by a petal's shape. However, without more context, it's hard to be certain exactly how it would be incorporated.
Well, in fanfiction, anything can happen. It could be that some sort of cosmic entity decided to play a joke and made Tony Stark Harry Potter's father. Perhaps Stark was involved in an experiment that opened a portal to the wizarding world and he had a relationship there without realizing the implications at first. Then, through a series of events, it was discovered that he was Harry's father. It's all about creativity and bending the rules of the original universes.
One possible plotline could be a crossover in an alternate universe where Harry Potter's father, James Potter, and Tony Stark meet. Maybe they are brought together by some magical - technological mishap. Stark could be intrigued by the magic that James wields and they end up working together to solve a problem that threatens both the wizarding world and the world of technology.