Who could be the main antagonist in a 'Harry Potter Son of Darth Vader' fanfiction?

If it was a fanfiction like that, it would completely distort the perception of Harry Potter. Harry is a symbol of hope and light in his own universe, but if he was like Darth Vader, he'd be seen as a much darker and more menacing figure. As for Darth Vader, his iconic status as a Sith Lord might be diluted if his traits were randomly imposed on Harry Potter. It would be a very odd mash - up.

Voldemort would most likely still be the main antagonist. Even with Harry being the heir of Darth Revan, Voldemort's goal of ruling the wizarding world remains the same. His dark magic and army of Death Eaters would pose a significant threat to Harry and his friends.

It could be Voldemort. Even though the Darth Nox element is introduced, Voldemort might see Harry's new connection as a threat to his own power. He could try to either use Harry's new powers for his own gain or destroy Harry to prevent him from becoming too powerful with this strange new heritage.

The main antagonist could be a rogue Jedi. This Jedi has seen the dark side of the Clone Wars and decides to take matters into their own hands, often clashing with Darth Vader's plans. He might be trying to stop Vader from causing more destruction during the war.

Well, it could be a wild mix of two very different universes. Maybe Harry would inherit some of Vader's powers along with his wizardry. He could have the ability to use the Force in the wizarding world, which would make him extremely powerful. He might use the Force to enhance his spell - casting or to sense danger in a different way than other wizards.

A powerful dark wizard who has a grudge against those with fire - related magic could be the main antagonist. He might see Harry's newfound 'Son of Fire' powers as a threat to his own plans for domination.

A new dark wizard could be the main antagonist. Maybe someone who was inspired by Voldemort's ideology but has new and more devious ways of causing chaos in the wizarding world. This antagonist could target Harry Potter's son to prove himself as a more powerful and feared dark wizard.

Padmé could be a main character. Since Darth Vader is without his suit, it could be a scenario where he's reliving memories of her, and she could appear as a Force ghost or in his dreams, guiding him in some way. Another character could be Obi - Wan Kenobi. Their relationship was complex, and without the suit, Vader might be more vulnerable, and Obi - Wan could try to sway him back to the light side.

Yes, there might be such a fanfic out there. It could be about a strange crossover where the magic world of Harry Potter collides with the Star Wars universe of Darth Vader. Maybe Harry Potter somehow gets transported to the Star Wars galaxy and has to deal with Darth Vader's power and the Sith ways, or perhaps Darth Vader finds his way into Hogwarts and causes chaos among the wizards.

It could also be a result of a powerful jutsu in the 'Naruto' universe gone wrong. Suppose a ninja was experimenting with a space - time ninjutsu and accidentally pulled in elements from the 'Star Wars' realm. Darth Vader's dark side energy might have influenced the creation of Naruto in this new, alternate reality. However, this would require a lot of suspension of disbelief as the two universes have very different rules regarding magic and technology.