One possible plotline could be Harry struggling to come to terms with his true parentage. He might be shunned by the wizarding world for his connection to the dark and mysterious Slenderman. Another could be that he discovers he has unique powers from Slenderman, like the ability to teleport or manipulate the minds of others, which he has to learn to control while also dealing with the normal Hogwarts challenges.
Well, one plot could be that Harry is initially unaware of his relation to Slenderman. As he grows older, strange things start to happen to him that he can't explain. He then discovers the truth and has to face the fact that his father is a very different kind of 'creature' compared to what he thought. He may then be forced to make a choice between the wizarding world that has been his home and the unknown world of Slenderman. This could lead to a journey of self - discovery where he tries to understand what it means to be the son of such a being and how to use his new - found powers for good or evil.
A plotline could involve Harry being hunted by both the wizarding world and forces related to Slenderman. He may have to find a way to balance his two heritages. Maybe he uses his Slenderman - related powers to defeat Voldemort in a very unorthodox way. Or perhaps he tries to hide his connection to Slenderman from his friends at Hogwarts for fear of their reactions, all while uncovering secrets about his father's past.
One possible plotline could be Harry struggling to come to terms with his new identity as the Son of Lucifer. He might face internal conflict, wondering if he's doomed to be evil like his supposed father. Another could be the wizarding world's reaction to his revelation. Some might fear him, while others might try to use his power for their own gain.
Another plotline could be that the wizarding world discovers Harry's connection to Arwen and Middle - earth. This causes a stir as they try to understand what it means for their world. Some might fear the unknown powers he could possess, while others see it as an opportunity to expand their magical knowledge. Harry could be caught in the middle of this, trying to prove that his connection to Arwen is a positive thing and that he can use it to protect both his worlds from common threats like dark forces that could exist in both the wizarding world and Middle - earth.
A possible plotline is that Harry grows up in a world where magic and technology co - exist. He uses his combined heritage to solve mysteries that neither wizards nor superheroes could alone. For instance, he might use his knowledge of magic to fix a malfunctioning Stark tech device that has been enchanted. Or he could use Stark - made gadgets to enhance his magic in battles against dark wizards. His relationships with characters like Hermione and Thor would also be central to the story, as they help him understand his two sides.
A plotline could be that Harry is on a journey to find out the truth about his parentage. He might search for hidden memories or secrets that were buried long ago. Along the way, he could encounter new magical creatures or dark forces that are interested in his unique situation. Maybe he has to go to places that were once forbidden, like certain parts of the Forbidden Forest or ancient tombs. And as he discovers more about his connection to Voldemort, he also has to deal with the fact that Dumbledore might have known something all along and kept it from him.
Well, a plotline could involve Harry trying to find out the truth about his mother. If he's Voldemort's son, was his mother in some sort of relationship with Voldemort? Also, there could be a plot where Voldemort discovers Harry is his son and tries to turn him to the dark side. Harry would then have to resist his father's influence, and this struggle could be the central focus of the fanfiction.
One possible plotline could be Harry discovers his latent archmage powers early on and uses them to quickly defeat Voldemort. Another could be that he has to go on a journey to learn how to fully control his archmage abilities while still dealing with the normal Hogwarts stuff like classes and friendships.
One possible plotline could be that Harry discovers his siren abilities during his time at Hogwarts. At first, he's confused and scared by these new powers. He might accidentally use his siren voice to make a teacher or a student do something they don't want to. Then he has to learn to control it with the help of Dumbledore or another magical creature.
The businessman could be trying to revolutionize the wizarding education system from a business perspective. He sees potential in making Hogwarts more efficient and cost - effective. He proposes ideas like installing modern muggle - like technology for administrative purposes or outsourcing some non - magical aspects of the school's operations. This causes a stir among the Hogwarts staff and students. Another plotline could be that he is a muggle - born who made it big in the muggle business world and now wants to use his wealth and influence to improve the status of muggle - borns in the wizarding world. He funds projects and initiatives that aim to bridge the gap between muggles and wizards.
Perhaps in this fanfiction, there could be a new, unexpected hero emerging. Maybe Neville Longbottom finally steps up in a big way. Since Harry is dead, Neville could be the one to find a new way to defeat Voldemort, like discovering a long - lost spell or uniting the houses in a way that has never been done before.
It's not extremely common. While there are many crossovers in fanfiction, combining Harry Potter with the rather dark and disturbing Slenderman concept might not appeal to the mainstream Harry Potter fanfiction audience. However, there is a niche group that enjoys such out - of - the - box crossovers for their unique take on familiar characters and worlds.