Well, perhaps the plot could start with a mysterious prophecy or an old magical artifact that reveals the truth. Harry would then be shunned by some in the wizarding world who fear his connection to Voldemort. Meanwhile, Voldemort might try to use this new knowledge to his advantage, either by trying to turn Harry to the dark side or using Harry's power for his own evil plans. Harry, on the other hand, would have to struggle with his own sense of self and his loyalty to his friends and the side of good.
One possible plot could be that Harry discovers his true identity gradually. At first, he might notice strange similarities between himself and Voldemort, like certain magical abilities that are more in line with the Dark Lord's. Then, as he digs deeper, he has to face the internal conflict of his new identity and decide whether to embrace it or fight against it.
In the world of Harry Potter fanfiction, it's highly possible. The fanfiction community often takes the established characters and storylines and twists them in unique ways. The relationship between Harry and Voldemort is already central to the original series, so imagining Harry as Voldemort's lost son is a way to expand on that relationship in a completely new and unexpected direction. It could lead to all sorts of interesting plot developments, such as how Harry would deal with this newfound identity, how the wizarding world would react, and what it would mean for the ongoing battle between good and evil.
One possible plot twist could be that Harry struggles with his new identity. He might initially reject the idea but then gradually discover certain dark powers within him that he has to learn to control. This could lead to a conflict with his friends who are unsure whether to trust him.
In a fanfiction with this premise, the plot might involve Harry being raised by the Dursleys as normal, but then strange things start to happen that make him question his origins. Maybe he has some unexpected magical abilities that are a result of his unique parentage. He could then start to search for the truth, which leads him to uncover secrets about Severus and Voldemort's past relationship and how he came to be. Along the way, he would have to deal with the consequences of this new knowledge, both in terms of his own self - image and how the wizarding world views him.
Well, a major theme is the conflict between good and evil within Harry himself. Since he's the son of Voldemort, he has that 'evil' blood in him, but he also has the qualities of a hero. Also, secrecy and revelation play a part. How and when does Harry find out about his true parentage? And what are the consequences of this revelation? Another theme could be the rewriting of the prophecy. If Harry is Voldemort's son, how does that change the prophecy that was so central to the original story?
One possible interesting plot point could be Harry's internal struggle. On one hand, he has been raised in an abusive situation, and on the other, he discovers this shocking relation to Voldemort. He might struggle with his own identity and whether he has the potential for evil within him like his supposed father.
Yes, there are some out there. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. However, this concept is quite a departure from the original Harry Potter storyline and often involves some very creative interpretations of the characters' relationships and backstories.
One plot twist could be that Snape discovers Harry is his son right before a major battle. This new knowledge gives him the extra motivation to fight even harder to protect Harry. Another could be that Voldemort finds out about this relationship and tries to use it against them both, perhaps by threatening to harm Harry if Snape doesn't turn on Dumbledore.
One possible plot could be that Harry, initially shocked and confused, discovers his true parentage. Voldemort, instead of seeing Harry as an enemy, tries to groom him to be his heir. Harry might struggle with his new identity, having grown up believing he was an orphan with no relation to the Dark Lord. He could be torn between the values he learned at Hogwarts and the dark allure of his father's power. Eventually, he might use his unique position to try and change Voldemort's ways, or he could completely reject his father and fight against him in a new way, using his knowledge of Voldemort's weaknesses from their family connection.
One possible plot could be that Harry discovers a prophecy that in order to truly end the dark magic in the wizarding world, he has to get close to Voldemort by becoming his assassin. So he pretends to be on Voldemort's side, all the while planning his demise.
One possible plot could be that Harry discovers a prophecy that ties his and Voldemort's fates together in a more intimate way than just being enemies. This leads him to seek out Voldemort to understand it better. As they interact, they find themselves attracted to each other. Voldemort, who has always been alone in his pursuit of power, starts to question his motives, and Harry tries to convince him to turn away from the dark path. The plot would be filled with internal and external conflicts as they navigate their relationship and the consequences it has on the wizarding world.