The plot might center around Harry facing challenges as the king. There could be anti - magic groups within the kingdom who oppose his rule because they fear magic. Harry would then have to find a way to co - exist with non - magical people while still maintaining his magical identity and duties as a king. He might also have to deal with international relations, as other countries might be jealous or fearful of a magically - ruled England.
One possible plot is that Harry discovers a hidden prophecy about his role as the King of England. This prophecy could be related to saving the magical and non - magical world from a great danger. As king, he has to gather allies, both magical and non - magical, to face this threat. He may also have to make tough decisions, like sacrificing some of his magical powers for the greater good of the kingdom.
One possible plot could be that Harry discovers he has some long - lost royal blood. He then has to navigate both the wizarding world and the political intrigues of the English court as he tries to balance his newfound status as a potential king. Magic could be used to solve problems within the monarchy, like protecting the king from dark magic threats.
Maybe Harry leaves England to explore the wizarding world in other countries. He could go to France to study different magic spells at Beauxbatons Academy. Or perhaps he travels to America to help the MACUSA (Magical Congress of the United States of America) deal with some dark magic threats.
One possible plot could be that Harry Potter discovers his secret heritage as a Prince of England. This might lead to a whole new set of magical and political adventures. He could use his newfound status to reform the wizarding world's relationship with the Muggle government. Maybe he'd introduce magical solutions to some of the Muggle world's problems, all while still dealing with the usual threats in the wizarding world like Voldemort's followers.
Well, it could be about the Queen of England being a secret witch and having a connection to the wizarding world of Harry Potter. Maybe she helps Hogwarts in some way during a crisis, like providing a safe haven on the castle grounds that are protected by magic and Muggle secrecy charms at the same time.
One possible plot could be that Harry Potter discovers he is pregnant (through some magical means perhaps) and decides to leave England because he wants to protect his unborn child from the dark forces that still lurk in the country. He might go to a far - off magical land where he can raise the child in peace and secrecy.
One possible plot could be that the Queen of England discovers the wizarding world through Harry Potter. Maybe she visits Hogwarts and is amazed by the magic there. She could then use her influence in the Muggle world to help keep the wizard - Muggle relations a secret in a more official way.
Maybe Harry Potter is wrongly accused of a great crime in the wizarding world of England. The Ministry of Magic, fearing his power or influenced by dark forces in disguise, decides to banish him. He then has to start a new life in other parts of the magical world, perhaps in France or America, facing new challenges and making new friends along the way.
It could be about Harry Potter achieving ultimate power and ruling the wizarding world. Maybe he overcomes new and even more dangerous dark forces and in the process, he becomes the king. He could make new laws and bring about great changes to Hogwarts and the entire wizarding community.
One possible plot could be that Harry Potter is somehow transported to the time of King Arthur through a magical mishap. Maybe he has to use his wizarding skills to help King Arthur in a battle against dark magic that is threatening Camelot. His spells and knowledge of magic could be a great asset.
Yes, there are likely some fanfictions out there with this concept. Fanfiction writers often come up with creative and unique crossovers. You can start by looking on popular fanfiction websites like Archive of Our Own or Fanfiction.net.