Well, perhaps in this fanfic, Naruto as the prince of wrath brings his ninja skills and unique chakra abilities into the DxD world. He might face challenges related to the different species and magic in that universe. His wrath could be a driving force that makes him either a feared or respected figure among the devils, angels, and fallen angels. He could also be on a journey to find a way back to his own world while getting involved in the complex politics of DxD.
The fanfic might explore how Naruto's character, which is known for his determination and growth in the Naruto series, develops further as the prince of wrath in the DxD setting. His relationships with the female characters in DxD could be an interesting aspect. For example, he could interact with Rias Gremory in ways that are different from the original DxD story. Maybe his wrath makes him more protective of certain characters, or it could lead to conflicts with other powerful beings in the DxD universe who underestimate him at first.
Obviously Naruto as the prince of wrath would be a main character. And characters from the DxD universe like Issei Hyoudou are likely to be main characters as well since Naruto's presence would interact with the existing storylines of DxD.
The plot could involve Sasuke exploring the wrath of nature in the Naruto universe. Maybe he discovers a new power related to nature that has been awakened due to some imbalance. He might have to face off against enemies who are also trying to harness this newfound power for their own evil purposes. Along the way, he could team up with Naruto and other friends to protect the village from the chaos that the wrath of nature brings.
The plot could involve an angel accidentally falling into the Naruto universe. The angel then discovers that there are similarities between the chakra in Naruto's world and the magic in the DxD world. As the angel tries to find a way back home, it befriends Naruto and helps him in his journey to become Hokage, while also learning about the values of the Naruto world.
One possible plot could be Naruto being summoned into the DxD world by some sort of magic accident. He might initially be confused but quickly adapt his ninja skills to the new environment. He could team up with some of the DxD characters to face a common enemy, like a powerful fallen angel or a rogue devil. His Rasengan and shadow clone techniques would be quite unique in this world.
The plot could also involve Naruto being mistaken for a new type of devil or a strange being in the Highschool DxD world. His chakra could be seen as a very unique power source. He might have to go to the high school in the DxD world and get into all kinds of adventures, like dealing with the pervy situations that Issei often finds himself in, but with his own Naruto - style humor and strength.
One possible plot could be that Naruto somehow gets transported to the DxD universe and meets Yasaka. They initially have a misunderstanding as Naruto's chakra and power seem strange to the beings in DxD. But as they get to know each other, they team up to face a common enemy that threatens both the ninja world Naruto comes from and the DxD world. They combine their unique abilities, Naruto's Rasengan with Yasaka's fox - like powers, to defeat the enemy and in the process, they become good friends and learn a great deal about each other's worlds.
One possible plot twist could be that Naruto's transformation into wrath is triggered by the loss of a dear friend. This could lead him to abandon his usual beliefs and go on a vengeful rampage against the enemy. Maybe he starts to use darker forms of his jutsu without regard for the consequences.
In this fanfic, Naruto could bring his sense of justice to Sona's side. Since Naruto is always about protecting his friends and doing what's right, he could inspire Sona and her followers. His chakra could be an interesting element in the world of devils and angels. He might even find a way to use his chakra to enhance the abilities of Sona's peerage members.
The plot could involve Naruto arriving in the DxD world with his goal - seeking nature intact. He realizes that the power dynamics here are very different from his own world. He starts to learn about the different races and their powers. As he is seen as a god, he is constantly challenged by various powerful beings. He uses his wisdom from the ninja world and his growing understanding of DxD to resolve conflicts and perhaps find a way back home while also making a positive impact on the DxD world.
One possible plot could be Naruto being transported to the Dragon DxD world. He might start as an unknown entity and have to prove himself. His ninja skills could be mistaken for some new form of magic. He could then form alliances with some of the characters in the DxD world, like Issei and his group, and together they could face common enemies.