Who could be the main antagonist in a 'Naruto exiled after the war' fanfiction?

Maybe some sort of combined form of Orochimaru and a powerful Hollow. Orochimaru is always after power and knowledge, and in this fanfiction, he could have somehow made his way into the Bleach world during Naruto's exile. The combined entity would be extremely dangerous, having both Orochimaru's cunning and the Hollow's brute strength.

Perhaps a secret organization within the Hidden Leaf that wants to take over the village. They use Naruto as a scapegoat, getting him banished so they can carry out their evil plans without interference from Naruto. They would be the main antagonists as they are the ones behind the false accusations and the push for his banishment.

Perhaps a new, unknown force. With Naruto gone, a previously hidden group with a vendetta against the ninja villages could emerge. They might blame the villages for the destruction caused during the war and see Naruto's death as the perfect time to strike, when the villages are still recovering and vulnerable.

Maybe the main antagonist is an outside force that has influenced the Fairy Tail guild to exile Naruto. For example, a dark guild could spread false rumors about Naruto, making the Fairy Tail members believe that he is a danger to them. This way, they can get Naruto out of the picture and then plan an attack on the Fairy Tail guild without having to deal with Naruto's power.

It could be some of the traditionalist elders in the Hidden Leaf. They might see Naruto as a threat even after the war, fearing his growing power and influence, and thus engineer his banishment. So they could act as antagonists as Naruto tries to find his place outside the village.

One possible plot could be that Naruto is exiled because some people fear his power after the war. He then travels to different lands, meets new allies and discovers hidden secrets about his family or the ninja world. Maybe he also starts to train in new and unique ways to become even stronger while in exile.

It could be a rogue ninja who was once part of a minor group during the war but has now risen to power. Maybe they felt overlooked or mistreated during the war and now seek revenge on the major villages.

Perhaps an ancient and dark deity who has been awakened due to some event related to Percy's exile. This deity wants to bring chaos to the world of gods and demigods, and Percy, even in exile, is the only one who can stop it. The deity would use all kinds of dark magic and minions to oppose Percy and his friends.

Maybe a rogue demigod who blames Percy for something and wants to make his exile permanent. This demigod could have some dark powers or be in league with some evil forces. They would constantly try to thwart Percy's attempts to return or find a way to clear his name.

It could be a new dark wizard who has risen to power. This wizard might see Harry as a threat to his plans, so he manipulates the situation to get Harry exiled.