Who could be the main antagonist in a 'Naruto House of Cards' fanfiction?

In a more unique take, it could be an entity created by the combination of modern - day technology and dark chakra. This entity could sense Naruto's powerful chakra in your house and see him as a threat to its plans of taking over both the Naruto world and our world, so it tries to eliminate him.

Well, it could be about Naruto finding himself in a political web similar to that in 'House of Cards'. Maybe he has to use his ninja skills to outwit political opponents in the Hidden Leaf Village who are trying to undermine his leadership or something.

Perhaps a corrupt hospital administrator who wants to shut down House's unorthodox gaming - related medical experiments. This person sees House's methods as a waste of resources and a threat to the hospital's reputation. They would do everything in their power to stop House from continuing, creating a lot of conflict.

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.

It could be a rogue Kumo ninja who is jealous of Naruto's power and wants to prove himself by defeating Naruto. This ninja might have some dark secrets and a grudge against Kumo as well.

It could be Orochimaru. He's always been interested in immortality and reanimation techniques. Maybe he reanimates Naruto for some evil purpose, like using Naruto's power to take over the ninja world.