One idea could be creating an OC who is a street urchin with a hidden power in the Dishonored world. They could get caught up in the political intrigue and use their unique skills to survive and make a difference. For example, they might have the ability to blend into shadows like Corvo, but in a more natural, untrained way.
Another interesting OC for Dishonored fanfiction could be an alchemist from a far - off land who comes to Dunwall. This OC could bring new potions and elixirs that have never been seen in the city before. Their arrival might disrupt the balance of power between the various factions as they try to either control or befriend this new figure.
One idea could be exploring the backstory of a minor character from the game. For example, you could write about the life of a city watchman before the events of Dishonored 2. What made him join the watch? What has he witnessed in the city? Another idea is to create an alternate ending. Maybe in your fanfiction, Corvo and Emily work together in a different way to save the empire, leading to a completely new political landscape in Dunwall. And you could also focus on the relationship between the Outsider and other characters, like how his influence might have affected someone in a more positive or unexpected way.
One idea could be a crossover where a character from RWBY gains the powers of Dishonored's Corvo. They could use the blink ability to quickly dodge attacks in battles against Grimm. Another idea is to have a setting where the world of RWBY is affected by the plague from Dishonored, and the characters have to find a cure while dealing with political unrest.
One idea could be a crossover where a character from Dishonored, like Corvo, somehow ends up in the wizarding world of Harry Potter. He might use his unique skills to navigate the challenges there, perhaps using his blink ability to quickly move through Hogwarts' corridors. Another idea is that a spell from the Harry Potter universe is misused in the Dishonored world, causing chaos among the different factions in Dunwall.
One idea could be a character from 'Dishonored' getting transported to the world of 'Game of Thrones'. Maybe Corvo could use his powers to navigate the dangerous political landscape of Westeros. He could use his blink ability to quickly move through the Red Keep, unseen by guards, and gather information that could change the balance of power among the houses.
A Dishonored crossover fanfic could involve a crossover with the Assassin's Creed universe. Maybe Altair or Ezio could end up in Dunwall and learn about the Outsider's mark and the unique stealth mechanics there. They could exchange techniques and fight together against the corrupt powers in Dunwall. It would be really cool to see how their different fighting styles and cultures interact.
There are fanfictions that imagine alternative endings for the dishonored series. Maybe in one, Corvo decides to side with the chaos instead of trying to restore order. This would lead to a completely different Dunwall, with new power dynamics and a much darker, more lawless city. Or a fanfiction could center around a new character who gets involved in the political intrigue of Dunwall, having to choose between different factions.
One idea could be creating an OC who has a unique power related to time manipulation. They could be from a different dimension and end up in the Avengers' world. Another idea is an OC who is a master of ancient magic and teams up with Doctor Strange within the Avengers group. Maybe an OC that is a super - intelligent android created by a villain but has a change of heart and joins the Avengers.
You could create an OC for your Persona OC fanfiction who is an artist. This artist OC could use their art as a way to understand and even manipulate the Metaverse. For example, they might draw scenes from the Metaverse that give clues about upcoming events or hidden locations. Their art could also be a form of therapy for other characters who are struggling with their dual lives in the real world and the Metaverse.
Perhaps an OC who is a half - human, half - beast creature. This OC could struggle with acceptance in both the human and beast - kin societies. They end up meeting the main characters during their adventures and learn to embrace their unique identity with the help of the group, while also adding their own combat skills, which are a blend of human strategy and beast - like strength, to the team.
One idea could be to explore the Riddler's origin story from the perspective of your original character (OC). Maybe your OC is a detective trying to solve the mystery of the Riddler's first crime spree. Another idea is to have your OC be a sidekick of the Riddler, either willingly or by being forced into it. They could then have a complex relationship where the OC tries to influence the Riddler's actions for better or worse.