Who could be the main antagonists in a 'Star Killer trained by Obi - Wan' fanfic?

Perhaps the fanfic could start with Obi - Wan finding the Star Killer in a difficult situation. He decides to take the Star Killer under his wing. During the training, they might face various challenges together, like attacks from Sith - related enemies. Obi - Wan would teach the Star Killer how to sense the Force, meditate, and use it for good. The Star Killer would grow in power and knowledge under Obi - Wan's tutelage.

The Akatsuki could still be the main antagonists. Even with Naruto's training by the Kyuubi, they would be after the tailed beasts. Their goals of collecting all the tailed beasts would put them in direct conflict with Naruto. And they have some really powerful members like Pain and Itachi.

It could be the other Hidden Villages. Since Naruto is becoming so powerful under Danzo's training, they might see him as a threat and try to stop him. Maybe they would send their best ninjas to take him down.

The Sith, definitely. They are always the main antagonists in the Star Wars universe, and in this fanfiction, they would be the ones trying to keep Anakin on the dark side. Palpatine, in particular, would be a major antagonist as he was the one who manipulated Anakin in the original story.

There could be new antagonists created specifically for this fanfic. Maybe some dark forces that were sealed away by Asura long ago are awakened. They would oppose Naruto because they see him as a threat to their resurrection or their evil plans.

It could be some rogue shinobi who are after Pakura's knowledge. Since she's training Naruto, they might see it as an opportunity to get to both of them and steal their techniques. Maybe they were once her enemies or just power - hungry individuals.

Obviously, Naruto and Obi - Wan are the main characters. Naruto, the ninja from the Hidden Leaf Village, and Obi - Wan, the Jedi from the Star Wars universe. They are the focus as Obi - Wan is training Naruto.

Jon Snow could be one. He has a sense of honor and leadership, much like Obi - Wan. They could bond over their shared values and Jon could learn from Obi - Wan's wisdom. Another could be Daenerys Targaryen. She is on a quest for power and Obi - Wan might see her as someone who needs guidance to use her power responsibly.

Blackbeard could also be a main antagonist. He has his own ambitions for power and the One Piece. With Luffy getting stronger under Dragon's training, Blackbeard would view Luffy as a direct competitor. Their paths are bound to cross, and Blackbeard would not want Luffy to achieve his goals before he does.

Obviously, Obi Wan is one of the main characters. There might also be other Jedi, perhaps his masters or his peers. And there could be villains or antagonists that he has to face in the story.