What could be the plot of 'Highschool DxD: A World without God' fanfiction?

It could be a powerful devil who wants to take over the entire world now that there is no God to oppose them.

Maybe in this fanfiction, the Nine - Tails in Naruto is actually a super - powerful Sacred Gear that was sealed within Naruto. This Sacred Gear has its own consciousness like in DxD. The story could revolve around Naruto trying to master this new form of power that is a blend of his chakra and the Sacred Gear's abilities. He would have to deal with the various factions in the DxD world who are interested in his power.

A possible plot could be Venelana going on a solo mission to uncover a mystery that has been plaguing the underworld. This mission could lead her to discover new allies and enemies, and along the way, she could learn more about her own strength and capabilities.

A good plot idea could be that the OC Dragon God has to hide their true identity in the high school. They are there to find a certain magical item that is hidden in the school. As they search, they get involved with the main characters and have to deal with the normal high school drama as well as the supernatural threats that come their way.

One of the most exciting aspects of Highschool DxD OC Dragon God fanfiction is the creation of unique characters. Writers can design their own original characters (OCs) with dragon god powers, which adds a whole new layer of intrigue to the story. For example, an OC dragon god could have the power to manipulate time, leading to some really cool plot twists.

The plot could involve Ben's aliens having an unexpected effect on the magic in the Highschool DxD world. His alien DNA might interact with the devil or angel powers in strange ways. For instance, if he transformed into Heatblast near a magic spell, it could cause the spell to go haywire. And his presence could also disrupt the power balance between the different factions in the DxD world, leading to new alliances and rivalries.

Well, it could be about Ranma getting transferred to the Highschool DxD world. Maybe he'd get involved in the supernatural battles there, using his martial arts skills. He might team up with Issei and the others, and his unique curse could add an interesting twist to the story. For example, his transformation between male and female forms could lead to some comical or strategic situations during fights.

Maybe Spider - Man's identity is mistaken in the Highschool DxD world. The characters might think he is some sort of new supernatural being. This could lead to a series of comical misunderstandings as he tries to explain his powers and where he comes from while also dealing with the various power struggles and intrigues in the Highschool DxD universe.

A plot could involve Shirou being transferred to the Highschool DxD school. He quickly catches the attention of Rias and her peerage. His different style of combat and his unwavering determination might lead to some friendly rivalries within the group. He could also introduce some new concepts of magic that the DxD characters have never seen before, like his ability to reinforce objects. And he may find himself in the middle of the power struggles between the different factions in this new world.

In this fanfiction, Thanos could be seen as a sort of ultimate antagonist for the entire Highschool DxD world. He might try to use the chaos of the three - way war between the Devils, Angels, and Fallen Angels to his advantage. He could start by eliminating the strongest beings from each side to tip the balance in his favor. However, the characters of Highschool DxD would not go down without a fight and would use their unique abilities and teamwork to try and take on Thanos.