Finally, when writing, try to blend the two styles of storytelling. 'Harry Potter' often has a sense of wonder and discovery, while 'House of the Dragon' has a lot of political intrigue and power struggles. Incorporate elements of both into your fanfiction. You can start with a small idea, like a dragon egg being found in Hogwarts, and then build on it, creating a story that is both engaging and true to the essence of both 'House of the Dragon' and 'Harry Potter'.
It's highly unlikely that the characters in 'House of the Dragon' would actually watch fanfiction about themselves. Fanfiction exists in our world, created by fans for fans, and the characters in the show are fictional entities within their own fictional universe. They don't have access to the fan - created stories about them.
Tyrion Lannister is often a popular character in these fanfictions. His intelligence and complex personality can add a lot to the story. He might befriend Daenerys or even be a mediator between her and Viserys in some alternate universes.
One interesting crossover could be the use of magic systems. In 'Harry Potter', magic is more about spells and potions, while in 'House of the Dragon' there is a different kind of magic related to dragons. Maybe a story where a Hogwarts student travels to the world of 'House of the Dragon' and tries to understand their magic.
A fanfiction might explore Viserys' relationship with his sister Daenerys in a more in - depth way. For example, it could show how they might have worked together more effectively if Viserys had been less cruel and more strategic. In this fanfiction, Viserys could have been a mentor to Daenerys, teaching her about the history and politics of Westeros.
Another plot might be Viserys traveling back in time. He gets a chance to relive certain events. This time, he decides to be more diplomatic. For instance, he tries to form an alliance with the Starks early on. This could lead to a completely different chain of events in the 'Game of Thrones' universe, with the North and the Targaryens working together against common enemies.
Another theme is family. Just like in the original lore, the relationships with family members play a big role. In these fanfics, a female Viserys might have different dynamics with her siblings, parents or children. Maybe she has to fight against the traditional family roles that are imposed on her. For instance, she could be in a situation where she has to prove herself worthy to her father who doubts a female's ability to rule.
Definitely not a true story. House of the Dragon is a work of imagination and creativity. It weaves a complex tale of power, politics, and dragons within a fictional realm.
One interesting Viserys fanfiction could be one that explores his early days before the events of the show. It might show his relationship with his family in more depth. For example, how he interacted with his siblings and what his dreams were for the future of his house. Another could be a fanfiction where Viserys survives and has to face the consequences of his actions in a different way, perhaps learning from his mistakes and trying to redeem himself. A third could be a fanfiction that delves into a romantic relationship for Viserys that was never explored in the original series, giving a new dimension to his character.