One possible reason could be to seek new challenges. After achieving so much in the Elemental Nations, he might feel the need to explore areas where his skills can be tested in different ways.
Maybe he leaves to protect the Elemental Nations. He could have discovered a new threat that he can only face by leading it away from the place he loves. In fanfiction, this could be a powerful and self - sacrificing move on his part. He has always been about protecting his home, and this would be an extreme form of that.
Another reason might be related to his personal growth. He has grown up in the Elemental Nations with a certain set of values and experiences. Leaving could be a way for him to break free from any remaining constraints, whether they are social or psychological, and truly become his own person in a new environment.
One reason could be to seek new challenges. In some fanfictions, Naruto might feel that he has accomplished all he can in the Elemental Nations. He has protected his home, become Hokage, and now he wants to explore the wider ninja world or even other realms that are unknown to the Elemental Nations.
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.
It could also be that Naruto has been tricked. For instance, someone he trusts feeds him false information about the elemental nations being involved in a heinous conspiracy against him or his loved ones. This misinformation leads him to take drastic actions and start to destroy the elemental nations. Another idea is that Naruto loses control of his newfound and extremely powerful abilities. These abilities might be too much for him to handle and they end up causing destruction on a massive scale, starting with the elemental nations.
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.
Another reason might be that Naruto is seeking a greater purpose. In the fanfiction, his 'godlike' state could make him realize that there are threats out there that he can't face while being tied to Konoha. He may leave to protect the world on a larger scale, believing that he can be more effective away from the village.
Power - ups are a common theme. Since it combines two powerful universes, the characters often gain new and unique abilities. For example, Naruto might get some devil - like powers in the DxD world.
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.
One reason could be a mission. Maybe he gets a top - secret mission that requires him to leave the village under Tsunade's leadership without her direct involvement. So he has to leave without much notice.
One possible reason could be false accusations against him. Maybe he's wrongly blamed for a crime he didn't commit, like being framed for a major attack in the village. This would lead the village leaders to force him out to maintain 'peace' and security.
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.