Who could be the main antagonists in a 'naruino after war fanfic'?

There could be a mysterious figure from Naruino's past during the war. This person has a grudge against Naruino and resurfaces in the post - war period to seek revenge, creating all sorts of problems for Naruino.

It could be about Naruino rebuilding his life. Maybe he starts a new business in the post - war era, using his skills to contribute to the reconstruction of the village.

One possible plot could be that Naruino, having survived the war, now focuses on rebuilding his village. He uses his unique skills and experiences from the war to improve the village's defenses and also to teach the younger generation how to protect themselves. For example, he could set up a training academy where he imparts his combat knowledge and ninja techniques.

Some former Death Eaters who escaped justice could be the main antagonists. They might be plotting to bring back Voldemort's ideology in a more covert way. Another possibility could be new dark wizards who emerge, seeing the post - war chaos as an opportunity to gain power.

It could be some rogue ninjas who were against the peace treaties after the war. They might form a group and try to disrupt the newly - established peace in the ninja world.

It could be some remaining monsters that survived the giant war and are now seeking revenge. They might target Nico specifically because of his role in the war. Another possibility is some rogue demigods who didn't like the outcome of the war and blame Nico for it.

Some of the pure - blood supremacist families who still hold grudges against Harry could be antagonists. They might not approve of Daphne getting involved with Harry, seeing him as a threat to their traditional values. For example, some of Daphne's extended family members who are still stuck in the old ways could try to break them up.

There could be a new group of villains who emerged from the shadows. They might have been observing the war and learned from the mistakes of previous antagonists. They could be more powerful and cunning, perhaps using new forms of jutsu or technology that were developed during the war. Maybe they are after some ancient artifacts or secrets that were unearthed during the Fourth Great Ninja War.

Nico di Angelo could be a main character as well. His powers over the dead and his unique perspective could be valuable. He might be dealing with the influx of new ghosts due to the large number of casualties in the war and trying to find a way to give them peace.

It could be the traditional God of War villains like the gods who oppose Izuku. Maybe Ares, if he's still around in the fanfiction's version of the God of War world, would see Izuku as a threat and try to stop him.