In Naruto metal claws fanfiction, who could be the main antagonist?

It could be Orochimaru from the Naruto universe who somehow manages to infiltrate the Metal Gear world. With his knowledge of dark jutsus and his devious nature, he would make a great antagonist. He could start experimenting on the soldiers in the Metal Gear world, creating some sort of mutant - ninja - soldier hybrids.

It could be Orochimaru. He's always been interested in dark and forbidden jutsu. In this fanfiction, he might have found a way to merge the dark forces of Dark Nights Metal with his own research, becoming an even more powerful and menacing antagonist.

They could be a gift from an unknown shinobi who recognized Naruto's potential. This shinobi might have a special connection to a blacksmith who crafted these unique claws.

It could be a dark wizard who also has an ability related to metal. He wants to take Harry's power for himself and rule the wizarding world. For instance, he might be able to corrupt the metal in Hogwarts and turn it against the students.

The metal claws could enhance Naruto's close - combat capabilities. They would give him an edge in slashing and grappling. For example, he could use them to quickly deflect incoming kunai or shuriken. Also, they could be used in combination with his shadow clone jutsu. One clone could distract an opponent while Naruto himself uses the claws to strike from an unexpected angle.

It could be someone from the Naruto universe who doesn't like Naruto's newfound fascination with Aku. For example, Danzo might see Naruto's interest in Aku as a threat to the stability of the village and try to stop Naruto from further exploring Aku - related things. So, Danzo could be the main antagonist in this case.

Maybe a new character could be introduced as the main antagonist. This character could be from a hidden village that has been secretly observing Naruto's growth. They realize his potential as a weapon and plan to steal his power or use him to start a war against other villages.

Krampus himself could be the main antagonist. Since he is a figure known for punishing the naughty, his actions in the Naruto world might be seen as unjust. He could be going after ninjas without really understanding their motives, causing a lot of trouble for the main characters.

It could be a rogue ninja who also has somehow acquired bankai - like powers. This antagonist might be jealous of Naruto's newfound abilities and wants to prove that he is the stronger one. So he starts causing chaos in the ninja world, challenging Naruto at every turn.

It could be a rogue ninja who wants to disrupt Naruto's business to gain power. Maybe he's jealous of Naruto's success and popularity in the business world. He could try to steal Naruto's business secrets or sabotage his operations.