Who could be the main antagonist in 'naruto returns to the elemental nations fanfiction'?

The plot might involve Naruto returning to discover that the elemental nations have changed a great deal in his absence. He could face challenges in terms of politics and power struggles among the different villages, and he'd have to use his skills and influence to restore balance.

A rogue ninja who has mastered all the dark aspects of the elements could be a great antagonist. This ninja could use their powers to create disasters, like summoning tsunamis with water element or causing volcanic eruptions with fire element. They might have a vendetta against the Hidden Leaf Village and see Naruto as a threat to their plans because of his growing elemental powers.

Besides Naruto, Hinata could play a significant role. As Naruto's wife in the original series, she could be his support and also use her Byakugan abilities to help Naruto keep an eye on the different regions of the elemental nations. Shikamaru, with his intelligence, might also be a key character, helping Naruto with strategic planning and handling political situations.

It could be an unknown ninja who has been researching dark and forbidden arts. This ninja accidentally unleashes the Black Death - like plague while trying to gain ultimate power.

Perhaps it's an old enemy who has somehow managed to come back stronger. Maybe someone from Orochimaru's old experiments that went wrong, but instead of dying, they gained some dark and powerful abilities. They see Naruto's return as a threat to their plans of world domination, so they target Konoha first. They might be able to control dark chakra in a way that no one has seen before, and use it to create chaos and destruction. They could also have some minions who are equally as powerful and loyal to them, making them a formidable foe for Naruto and Konoha.

There might be an old sage living in the mountains of one of the elemental nations. The sage has vast knowledge of ancient ninja arts and has been in isolation for years. Naruto's encounter with this sage could be a turning point in his journey, as the sage could offer him wisdom and perhaps even a new form of power or training method.

A new character could be the main antagonist. This character could be from a far - off land that Naruto has never encountered before. This antagonist has heard of Naruto's power and wants to prove himself by defeating Naruto and taking over the Hidden Leaf. He might have unique powers and a large army at his disposal. He could also be manipulating some of the villagers from the inside to create chaos before making his big move.

The main antagonist could be an ancient evil that has been awakened. Harumi returns to find Ninjago in chaos because of this new threat. She may initially be blamed for the chaos, but as the story unfolds, it becomes clear that the real villain is this ancient evil which the ninjas and Harumi must then team up to defeat.

One of the most exciting aspects of 'Naruto Devil Elemental Nations Fanfiction' is the unique blend of Naruto's world with devilish elements. It allows for new and unexpected character developments. For example, a character might gain devil - like powers and struggle with the moral implications. This type of fanfiction often takes the original Naruto story in a darker and more complex direction, appealing to those who want to see different interpretations of the beloved anime.

One possible reason could be to search for a new power source. Maybe in the fanfic, the powers within the Elemental Nations have become stagnant for him, and he believes there are greater sources of power elsewhere.