Perhaps a fanfiction where the Supreme Kai discovers a new form of ki that only he can access. He then has to figure out how to use it to defend the universe from a new, powerful threat. This could involve a lot of exploration of his character and his relationship with the other Z - fighters.
A cool plot could be that the Supreme Kai gets transported to an alternate universe where all the rules are different. He has to adapt quickly and find a way back home while also dealing with the strange versions of his friends and enemies in this new universe. There could be a lot of action and some really interesting character interactions in this kind of story.
One idea could be a story where the Supreme Kai has to train under Goku to regain his lost powers. It would be interesting to see their different fighting styles and how Goku's positive energy affects the Supreme Kai.
One idea could be exploring the Supreme Kai of Time's past before she became the keeper of time. Maybe she had a different role or a relationship that shaped her into what she is now.
Well, in such fanfiction, a really cool concept might be time - travel adventures that involve the Supreme Kai of Time. For example, she could take characters from different eras in Dragon Ball Z to fix certain events in the timeline. This would not only add an exciting element of adventure but also allow for some really interesting character interactions between different generations of characters.
Perhaps it delves into the relationships between the Supreme Kai and other characters in a more in - depth way. For example, how they interact with the Saiyans on a day - to - day basis, not just during battles. It could show their influence on Saiyan culture or vice versa.
One idea could be a crossover with the Naruto universe. Goku and Naruto could team up to fight a common enemy. Maybe they face an evil villain who has the power - stealing abilities like Cell and the ability to use powerful ninja jutsus. Another plot could be a crossover with One Piece, where Luffy and Goku have a friendly competition about who can eat more food and then end up having to work together to defeat a new threat at sea that has the strength of Saiyans and the deviousness of pirates.
One interesting plot could be a new villain emerging from a long - forgotten dimension. This villain has powers that are a mix of different techniques from all the universes in Dragon Ball. He starts causing chaos by stealing the energy of strong fighters to open a portal to an even more powerful realm.
Perhaps a fanfiction where a young Saiyan from a destroyed planet manages to find their way to the Xenoverse 2 world. This Saiyan has a different fighting style compared to the ones we know. They join the Time Patrol not just to save timelines but also to find a new home for their kind. Along the way, they face discrimination from some of the other races in the Xenoverse due to their Saiyan heritage, but they prove themselves worthy through their strength and determination.
Another interesting plot could be that the gamer aspect brings in virtual reality elements. The Z - fighters enter a virtual world where they have to fight enemies with different rules. This virtual world could have power - ups and obstacles that are based on video game concepts, like finding hidden keys to unlock new areas or defeating bosses to gain special abilities that they can then use in the real Dragon Ball Z world.
Vegeta could also work well. Vegeta's pride and determination, along with his powerful fighting skills, would contrast nicely with the Supreme Kai's more reserved and wise nature. They could learn from each other and have some intense rivalries within the story.
A plot could involve Bulma creating a new device that Goku needs to use in order to defeat an extremely powerful enemy. Goku has to learn how to operate this device with Bulma's guidance, and they face many obstacles along the way. This would show their cooperation and how their different skillsets complement each other. It could also lead to some comical moments as Goku tries to understand the complex technology. Another interesting plot could be that they are both transported to an alternate dimension where the rules of the Dragon Ball world are slightly different. They have to figure out how to adapt and find a way back home while also uncovering the secrets of this new dimension.
One idea could be Future Gohan training a new generation of fighters in a post - apocalyptic world. He could pass on his skills and knowledge, creating a new hope for the future. Another plot could involve him finding a way to travel back in time to prevent the events that led to his world's destruction. Maybe he discovers a hidden power within himself that he didn't know he had and uses it to fight against the remaining threats in his world.