Well, in some fanfictions, RA9 might be an ancient android code that was lost but is now being rediscovered. This could lead to new abilities or a deeper understanding of android nature. For example, it might unlock hidden memories or powers that the androids didn't know they had, which could change the power dynamics between humans and androids in the Detroit Become Human universe.
RA9 could be Markus. Since he is a central figure in the android revolution, some fanfictions might interpret him as the manifestation of RA9, bringing change and hope to other androids.
You could focus on the relationship between Connor and Hank in a fanfiction. Imagine if Connor had a different origin, like he was created by a group of rogue scientists who wanted him to be more human - like from the start. This could lead to a whole new dynamic between him and Hank, as they would have different interactions and goals. Also, you could write about how the androids develop new emotions and abilities that were not shown in the original game.
A sumo fanfic in this context could involve an android being created specifically to be a sumo referee. This android would have to learn all the rules and subtleties of sumo. Along the way, it might face discrimination from traditional sumo enthusiasts who don't believe an android can truly understand the sport. This could lead to a story about acceptance and the android's journey to prove itself in the sumo world.
A more emotional plot could be about a Traci trying to find her 'sister' Traci. She could go on a long journey across Detroit, encountering different characters along the way. Some might help her, while others might try to use her for their own gain. This would be a story full of suspense, hope and despair.
One idea could be a story where an android character, like Kara, discovers she has the ability to become pregnant in a world where androids are evolving. This could lead to a journey of self - discovery as she tries to understand what it means for an android to carry a new life. It could also explore how society views this phenomenon, whether with fear, curiosity or acceptance.
One idea could be an OC who is a prototype android with unique abilities that neither CyberLife nor the deviants are aware of. This OC could be caught in the middle of the conflict between humans and androids, trying to find its own place in the world.
One idea could be exploring the lives of the androids in the Eden Club before they are 'activated' for customers. Maybe they have their own little community and relationships among themselves. Another plot could be an android from the Eden Club trying to escape and find a new purpose outside of the club, facing various challenges and prejudices along the way. And a third idea is a customer who visits the Eden Club regularly and starts to develop real feelings for one of the androids, leading to a complex relationship.
One plot idea could be that chubby Connor is discriminated against in the android world due to his appearance. But he uses this to his advantage, showing more humanity than the 'perfect' androids. For example, he befriends a human who initially judges him but then realizes his worth.
One interesting plot idea could be a story where an android, who is not part of the main cast, discovers a hidden part of Detroit that holds the key to a past event that could change the relationship between humans and androids. This android could then face the dilemma of whether to reveal this discovery or keep it a secret for its own safety.
One idea could be inserting yourself as a new android model created by CyberLife. You could have unique abilities that set you apart from the existing androids like Connor, Kara, and Markus. For example, you might have the ability to instantly analyze and predict human behavior more accurately than Connor. Another plot could involve you being inserted into the story during the android revolution. You could either side with the androids and use your 'human' knowledge to help them in ways they hadn't thought of, or you could try to find a middle ground between the humans and androids to end the conflict peacefully.