One possible plot is that their brotherhood is a secret that has been hidden for a long time. As they find out, they have to deal with the implications in both the wizarding world and Chuck's world. For example, there could be a prophecy related to their union that puts them in danger from dark forces in both worlds.
Yes, there might be. The world of fanfiction is vast and diverse. There are many creative writers who come up with all sorts of interesting and unexpected crossovers. It's possible that someone has written a story where Harry Potter is Chuck's brother, exploring how their relationship would impact the Harry Potter universe and whatever world Chuck is from.
Well, it could completely rewrite the destinies. For Harry, instead of the wizarding world being his main focus, he might be more involved in Chuck's world, which could be full of high - tech and modern day adventures. Chuck, on the other hand, might gain access to the magic of Harry's world. Maybe he could use magic to solve some of his problems in his own world, like dealing with the bad guys in a more magical way.
Well, think about it. Harry, being used to the magical community, would have a different set of values. Chuck, coming from a world of technology and espionage, would have his own. They could have some really deep conversations about loyalty, friendship, and what it means to do the right thing. Maybe Harry would introduce Chuck to his friends from Hogwarts, and Chuck would introduce Harry to his friends from his own world. There could be some really funny moments when the two different groups of friends interact, like when Hermione tries to understand a complex piece of technology and Chuck's friends are completely baffled by magic.
The plot might start with their shared origin. Maybe they were separated at birth due to some dark magic or a mutant - wizard conflict. As they grow up separately, they develop their own powers and personalities. Then, through a series of events, they are brought together. They could face a common enemy that is a threat to both the wizarding world and the mutant world. Along the way, they learn about each other and their shared family history, and they start to build a relationship as brothers.
One possible plot could be that there is a powerful, ancient magic that links the two universes. Harry Potter and Gaara are unknowingly brothers due to this magic. A dark entity threatens both worlds, and only by combining their powers and the knowledge of their two different cultures can they defeat it. Along the way, they have to overcome their differences in personality and upbringing. Harry, who grew up in the wizarding world, has to understand Gaara's more harsh and lonely upbringing in the Hidden Sand Village. And Gaara has to adapt to the more complex social and magical structure of the Harry Potter world. They would form a bond stronger than just brotherhood as they fight side by side against the common enemy.
In this fanfiction, the brother being an idiot might mean he has no sense of self - preservation. He could be the type to run towards a dangerous magical creature instead of away from it, thinking it's just a friendly beast. Harry then has to constantly save him, and it becomes a running joke in the story about how clueless the brother is.
Perhaps the plot could start with their unusual upbringing. Harry grows up with the Dursleys while Tony has his own issues with his father. They both develop their unique skills. When they meet, they realize they are brothers. They then start to combine magic and technology. For example, they could use magic to enhance Tony's suits or use technology to create new magical artifacts. Along the way, they face challenges from those who oppose the mixing of these two very different worlds, like some traditional wizards who don't trust technology and some tech - moguls who fear magic.
In this fanfiction, the older brother of the Boy - Who - Lived (BWL) might have a very different relationship with the wizarding world. He could be an outcast because he is overshadowed by his younger brother's fame. So, he might decide to create his own path, away from the typical Hogwarts hero - worship. But when danger really comes to Harry, he steps up. He might have some knowledge about the dark arts that he uses to fight the enemies in a more unorthodox way compared to Dumbledore's side.
One possible plot could be that Harry's brother has been hidden away all this time due to a powerful dark magic spell. As the story progresses, Harry discovers his brother's existence and they have to team up to fight against a new dark wizard threat that is rising in the wizarding world. Their combined powers, with Harry's experience and his brother's unique abilities, are the key to saving the day.
The plot could involve a mystery around their family. Maybe they are siblings but there are secrets about their parents that they need to uncover. As they dig deeper, they find out that their family has a special connection to an ancient magic. Along the way, they make new friends who help them in their quest. Harry's Gryffindor courage and Raven's unique traits could combine to make them a formidable duo in the wizarding world.