Well, one interesting plot could be how Harry Potter uses his magical skills in a completely new way to rule the Britons. Maybe he combines his knowledge of spells with political acumen to bring about great changes in the wizarding and Muggle worlds alike.
In this fanfiction, perhaps there is a plot where Harry has to face off against some traditional pure - blood families who oppose his rule as King of the Britons. He would then have to use his charisma and the loyalty of his friends to overcome these challenges. He might also introduce new laws in the wizarding world to promote equality among all magical beings, which would be a significant and interesting plot point.
There might also be some new characters introduced. For example, some powerful wizard or witch from an old and noble family who either supports or opposes Harry's rule. And perhaps some Muggle - born wizards who look up to Harry as a symbol of change and hope in the wizarding world that is now under his leadership as King of the Britons.
Well, one interesting plot could be the main character having a unique power that even Harry Potter doesn't possess. Maybe they can control time in a different way than Hermione's time - turner. This could lead to all sorts of adventures, like going back to prevent some of Voldemort's early evil deeds.
In many 'Harry Potter King of Serpents fanfiction', there could be a plot that involves the ancient prophecies related to serpents. Harry might be seen as the key figure in fulfilling or averting some great serpent - related prophecy that has been long forgotten in the wizarding world. This could lead to a whole new adventure filled with mystery and danger.
Well, in some fanfictions, there could be a plot where Harry discovers his hidden ability to control werewolves. Maybe he forms an alliance with the werewolf community and uses his new - found power to fight against the dark forces. Another plot might involve Harry being turned into a werewolf himself and having to struggle with his new identity while still trying to fulfill his role as the Boy Who Lived.
In some Harry Potter 8 fanfictions, there are plots where the characters continue to face new dark magic threats. For example, a new dark wizard might emerge, and Harry, Hermione and Ron have to use their combined skills and knowledge to defeat this new foe. Another plot could be about the exploration of the wizarding world's past in more depth, revealing secrets that were previously unknown.
Well, perhaps in the 'Harry Potter Serpent King Fanfic', there is a plot where the Serpent King has a secret alliance with a certain group of wizards. This alliance could be for the purpose of overthrowing the existing magical order or for some other hidden motives. The fanfic might then detail how Harry Potter and his friends discover this alliance and try to stop it.
One interesting plot could be about the Potter family's hidden secrets being unearthed. Maybe there are ancient spells or prophecies related to them that no one knew before. Another could be a story where the Potter family has to face a new and powerful dark force that is specifically targeting them due to their legacy. And a third plot might involve time - traveling within the Potter family's history to correct past mistakes or learn from them.
Well, in some 'harry is a king mate fanfiction', there might be a plot where Harry discovers his new regal status and has to learn the ropes of being a king while also dealing with his mate. For example, he could be facing political intrigue within the magical kingdom and his mate might be his source of support and also a key to solving some of the mysteries related to his new role.
Another possible plot is that Harry's secret as a king is tied to a magical or supernatural element. For example, there could be a prophecy that only he can fulfill as a king. And his journey to discover and fulfill this prophecy involves him facing various challenges, making new friends and enemies, and ultimately rising to his true position as a king with great power and responsibility.
Another plot could be that Umbridge is forced to work with Harry and his friends against a greater evil. This would be a huge shift as she hates them so much in the original. But in the fanfiction, they might have to put aside their differences when a new dark wizard emerges, more powerful than Voldemort, and they realize they need all the help they can get.