One idea could be that the OC is from a different dimension and has a unique power that Goku Black is intrigued by. He decides to use the OC to further his own evil plans at first, but then starts to develop unexpected feelings. Another plot could be the OC being a time traveler who tries to stop Goku Black's rampage, but gets caught in his web of lies and manipulation. A third option is the OC is a Saiyan hybrid who is initially on Goku Black's side because she is misled by his false charm, and then has to face the truth and make a difficult choice.
A possible plot for Goku Black x OC fanfiction is that the OC is a martial artist from a forgotten planet. Goku Black encounters the OC during his search for power. The OC challenges him, and despite being much weaker, shows great courage. This piques Goku Black's interest. As time passes, the OC starts to learn from Goku Black's techniques, and in turn, Goku Black begins to question his own actions because of the OC's unwavering moral code. Another idea is the OC has the ability to see the future in dreams. She has a recurring dream about Goku Black destroying everything. So she sets out to find him and change his fate, which sets off a chain of events where they are constantly in each other's orbits, their fates intertwined.
Well, a plot could involve the OC being a healer. Goku Black gets injured during one of his battles and the OC heals him. He then keeps the OC around as a sort of tool, but gradually realizes that the OC's presence is changing him in ways he doesn't understand. Or perhaps the OC is an artist who can capture the essence of a being in their art. Goku Black, curious about this power, kidnaps the OC. As the OC draws him, he starts to see himself in a new light through the OC's art. And also, the OC could be a scientist who discovers a way to weaken Goku Black, but instead of using it right away, tries to understand his motives first, leading to a complex relationship.
One idea could be that Goku and Goku Black are forced to team up against an even greater threat from another universe. They start to understand each other's fighting styles during the battle and gradually develop a grudging respect for one another.
One idea could be exploring their relationship in an alternate universe where they succeed in their plans. Another could be a story where Goku Black has a change of heart due to his connection with Zamasu and tries to stop their destructive ways. Maybe a plot where they face a new enemy that forces them to reevaluate their alliance.
One idea could be that they discover a new realm together and have to face an unknown threat there. Their combined power might be put to the test in ways they never expected.
One idea could be that the reader is a time - traveler who accidentally gets stuck in the Dragon Ball universe during Goku Black's reign. Another could be that the reader has a special power that Goku Black is interested in and tries to manipulate the reader to use it for his own evil plans. Or perhaps the reader is a Saiyan from another planet who Goku Black sees as a potential ally or threat in his quest for universal domination.
One idea could be Black Goku, with his different personality, trying to understand Chichi's strong - willed nature. Maybe he initially clashes with her over protecting Gohan and Goten, but then gradually comes to respect her maternal instincts.
A possible plot is a time - travel scenario. Goku Black and Zamasu go back in time to try and change the course of history to make it easier for them to achieve their goals. They might target events like the Saiyan - Earthling alliance or try to prevent Goku from ever becoming a Super Saiyan. This would create a lot of chaos and interesting interactions with past versions of characters.
In 'naruto black goku fanfiction', a plot could be that Black Goku is somehow connected to an ancient evil in the Naruto world. For example, there could be a long - forgotten scroll or prophecy that mentions a being like Black Goku. When he arrives, he starts to awaken dark forces that were once sealed away. Naruto and his friends then have to go on a journey to find out the origin of Black Goku and how to stop these newly awakened threats. Along the way, they might encounter new types of enemies and also gain new powers to face Black Goku and the emerging darkness.
One idea could be Goku Black crossing over into a modern-day Earth where he has to deal with advanced technology that he doesn't understand at first. Another could be a crossover with a different anime universe, like Naruto, where Goku Black's power clashes with the ninja abilities. Maybe he teams up with Naruto against a common enemy.
For Goku Black reincarnation fanfiction, a plot could involve him being reincarnated as a half - Saiyan, half - something else (like a Namekian). This would give him new powers and a different perspective. He might be hunted by an organization that fears his power, and he has to find a way to either hide or use his powers to fight back. Along the way, he could encounter other characters who help him understand his new existence.
One idea could be Goku Black getting caught in an alternate dimension where his powers are affected in strange ways, leading to unique interactions with other characters in a lemon - themed scenario. For example, he might have to rely on an unexpected ally to regain his strength while dealing with newfound feelings.