Another possibility is for self - discovery. Naruto has always been defined by his relationships and his role in the Elemental Nations. By leaving, he could be on a journey to truly understand himself without the expectations and labels of his homeland. He might want to find out who he is outside of being a hero and a leader in the Elemental Nations.
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.
Perhaps it's due to a threat. In certain fanfiction scenarios, there could be a hidden or emerging threat that Naruto discovers. However, instead of fighting it in the Elemental Nations, he decides to leave in order to draw the threat away from his home and loved ones. He would rather face it alone in other lands than endanger his nation.
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.
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.
One reason could be to seek new challenges. The elemental countries might have become too familiar, and he wants to explore uncharted regions to test his skills further. Another could be to escape from the fame and expectations in the elemental countries. He might feel suffocated by the constant attention and the high standards set for him.
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.
Sasuke would likely understand Naruto's motives better than most. He himself has had his own reasons for leaving in the past. He might give Naruto some advice based on his own experiences, like how to survive in unknown lands. But at the same time, he would also be a bit envious of Naruto's new adventure.
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.
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 to protect Konoha from a great danger that he can only face by leaving. Maybe there's a powerful enemy who has a vendetta against Naruto but would spare Konoha if he goes far away. Another reason might be a sense of self - exile due to some event that made him feel he no longer belongs in Konoha, like a misunderstanding where the villagers turn against him again.
Perhaps he is lured away by an unknown force. In some fanfictions, there might be a mysterious character or group that tricks Naruto into leaving Konoha. They could make false promises about his parents or his true power, making him curious enough to follow them.