Another storyline could be that Harry goes to Bulgaria to hide from the threats in the UK wizarding world. While there, he has to adapt to a new culture and way of life. He could start teaching at a Bulgarian wizarding school, sharing his knowledge of Defense Against the Dark Arts. He might also fall in love with a Bulgarian witch and have to deal with the cultural differences in relationships.
There could be a fanfiction where the Bulgarian Quidditch team, the Bulgarian National Team perhaps, has some sort of special training regime that they share with the Gryffindor team. This could involve different flying techniques or strategies specific to Bulgarian Quidditch culture. It would be a great way to explore the connection between the two in the context of the 'Harry Potter' universe.
Some Harry Potter - themed forums might also be a good place to find 'Harry Potter Bulgaria fanfiction'. There are often sections dedicated to fan - created stories, and members might share their own Bulgarian - inspired Harry Potter tales or know where to find them. For example, the Leaky Cauldron forums used to have a great community for sharing fanfiction.
One possible storyline could be a character getting hit by a powerful dark spell during a battle, which causes brain damage. Then the story could revolve around their struggle to regain their magical abilities and memories. For example, if Harry were to be the one with brain damage, he might have to relearn spells and how to interact with his friends in Hogwarts.
One possible storyline is that the Potter Manor is under attack by a new dark force. Harry and Ginny have to defend it using their skills and the help of their friends. Another could be that they are renovating the manor and discover some long - lost family secrets during the process.
A possible storyline is that Ruby Rose, with her combat skills, trains the students at Hogwarts in self - defense against the dark arts. Harry Potter might be initially skeptical but then realizes the value of her unorthodox methods.
One storyline could be that Harry, after the events in the wizarding world, decides to take a break and travels to Gotham. There he meets Bruce, and they end up teaming up to take on a new threat that combines magic and Gotham's usual criminal element. Maybe a villain who has somehow gotten hold of a powerful magical artifact and is using it to wreak havoc in the city.
One possible storyline could be that the hobgoblin is a magical creature that has been trapped in Hogwarts for centuries and Harry discovers it. The hobgoblin then teams up with Harry to uncover the secrets of Hogwarts that are related to a new dark threat. Another could be that the hobgoblin is a messenger from an unknown magical realm and it chooses Harry to be the one to communicate with its realm.
Well, it could be a story where Harry is tricked into believing that Muggles are responsible for some great harm to his loved ones in the wizarding world. So, in his rage and misdirected sense of justice, he starts targeting Muggles. But this is a very un - Harry - like behavior as the real Harry is all about protecting the innocent, whether they are wizards or Muggles.
One possible storyline could be Harry growing up in Gotham, learning Batman's ways, and then suddenly discovering his wizarding heritage. He would have to adjust to the magical world while still holding onto his Batman - trained values. Another could be that Batman somehow ends up in the wizarding world and has a relationship there, resulting in Harry. Then the story could focus on how Harry uses his father's skills to combat dark magic.
One possible storyline could be Harry's struggle to prove his innocence while in Azkaban. Maybe he discovers some dark secrets within the prison walls that are related to a larger threat to the wizarding world. Another could be his attempts to escape and the friends he makes or enemies he encounters during the process.