One possible plot could be that Harry, as Legolas' son, discovers his true heritage in a very unexpected way. Maybe he has some elven powers that start to manifest during his time at Hogwarts, like extraordinary archery skills or the ability to move silently. This causes a stir among the wizarding community as they try to figure out how a half - elf could exist in their world.
Well, perhaps in this fanfiction, Harry is raised in Middle - earth by Legolas until some dark force threatens both Middle - earth and the wizarding world. Legolas realizes that Harry has a special connection to the wizards and sends him to Hogwarts. There, Harry uses his elven knowledge and skills, along with his wizarding magic, to fight off this new threat that is trying to take over both realms.
In these fanfics, a frequent theme is the discovery of self. Harry, finding out he is the son of Legolas, has to re - evaluate who he is. Another common theme is the power dynamics. Combining the power of a wizard and an elf could be a very interesting aspect to explore. Friendship is also a theme. Harry would have to maintain his old friendships while making new ones in the elven world. And of course, the theme of love could be explored, like how his relationship with his new family and friends develops over time.
In the official lore of both 'Harry Potter' and 'The Lord of the Rings' (where Legolas is from), this is completely impossible as they belong to different fictional universes. However, in the world of fanfiction, anything goes. Writers can create an alternate reality where magic systems cross over and such a relationship can be made to exist. It might require some really creative world - building to make it believable, but it can be a really interesting concept to explore.
Well, one possibility could be that Harry has some sort of angelic powers inherited from Castiel. He might use these powers to fight Voldemort in ways that are different from the original story. For example, he could heal the injured more effectively during the battles.
Well, perhaps the plot could involve Harry discovering his Titan heritage and having to deal with new powers. He might struggle to balance his wizarding world life with this new Titan side. Maybe he has to face enemies that are both from the wizarding world and related to his Titan lineage.
Well, one possibility could be that Harry discovers his true parentage as Sauron's son in a very shocking way. Maybe through some dark magic revelation. Then he might struggle with his identity, being a part of the wizarding world that he loves but also having this dark connection. He could face a lot of inner turmoil as he tries to decide whether to embrace his dark heritage or fight against it.
In this fanfiction, perhaps Harry's identity as the Joker's son makes him an outcast in the wizarding world. The story could revolve around him trying to prove that he's not just a product of his 'father's' evil. He could use his Joker - like cunning and unpredictability to outwit his enemies in Hogwarts, who might be prejudiced against him due to his strange heritage.
Well, it could be about Harry having the chaotic and unpredictable nature of the Joker as his 'father' in this fanfic world. Maybe he uses some of the Joker's unorthodox tactics in the wizarding world, causing a stir among the witches and wizards. He might have a very different approach to dealing with Voldemort compared to the original story.
In this fanfiction, the plot could be that Harry discovers his true parentage as the son of Dionysus later in his Hogwarts years. This revelation could send shockwaves through the wizarding community. His relationship with his friends, like Ron and Hermione, could be tested as they try to understand this new aspect of Harry. He may also be drawn into a mystery related to the ancient Greek magic that his father represents, and he has to travel to different places, both in the wizarding world and perhaps even to the remnants of the ancient Greek magical sites, to uncover the truth about his powers and his role in the grand scheme of things.
Well, perhaps Harry could inherit some of Hercules' super strength. He might use it to fight Voldemort in a more physical way, like being able to lift and throw large objects at the Death Eaters. It could also add an interesting dynamic to his relationship with his friends, as they might be both in awe and a bit intimidated by his newfound power.
One possible plot could be that Harry discovers his connection to Nightwing in a mysterious way. Maybe he starts having strange dreams or finds an old artifact that reveals the truth. Then he has to learn to balance his wizarding world life with this newfound heritage related to Nightwing, which could bring in new powers and a whole new set of challenges.