Fanfiction about Harry Potter being the son of Lord Voldemort: What are some possible plotlines?

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 being held captive by Voldemort in a way that's like a pet. Voldemort might use Harry to show his power over the Boy Who Lived. Another could be that Harry has some sort of magic that makes Voldemort keep him as a pet instead of killing him immediately.

One possible plotline could be that Harry has to hide this fact from his friends at Hogwarts, fearing their reaction. He might struggle with feelings of guilt and confusion, especially if he starts to show some of Voldemort's darker tendencies.

In some versions of this type of fanfiction, there could be a time - travel element. Harry travels back in time and ends up getting involved with a younger Voldemort. He sees potential in Voldemort that he believes can be redirected for good, but instead, he gets drawn into Voldemort's dark plans. As a result, he begins to work with Voldemort against the very people he once called friends and allies.

One possible plotline could be that Voldemort rescues Harry because he sees potential in him to be a powerful ally in his quest for total domination. Harry, being evil, might have already started to dabble in the Dark Arts on his own and Voldemort wants to harness that. Another plotline could be that Voldemort saves Harry from some other threat, like the Ministry of Magic which has turned against Harry for his evil deeds. This could lead to a strange alliance between them as they both have a common enemy in the Ministry.

One possible plotline could be that Voldemort captures Harry early on and instead of killing him, decides to keep him as a pet. Harry, being in this strange situation, might start to develop a warped sense of loyalty to Voldemort over time.

One possible plotline could be a magical accident that causes Harry to be magically bound to Voldemort in a way that he has to 'ride' him, like being attached to his back or something. This could lead to a situation where Harry has to endure Voldemort's actions while trying to find a way to break free. And during this time, he might gain some insights into Voldemort's thoughts and plans, which he could later use against him.

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.

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.

One possible plotline could be that Harry is tricked by Voldemort. Voldemort might use some powerful dark magic or false promises to make Harry believe that joining him is the right thing to do. For example, Voldemort could claim to have a way to end all the bloodshed in the wizarding world if Harry helps him.