The fanfic might focus on her relationship with the other Z - fighters. She could start off as an antagonist but then gradually learn the value of friendship and turn into an ally. For example, she might initially be on a mission to carry out her father's evil plans but then realizes the error of her ways through interactions with Goku and his friends.
The plot could involve Goku and Goku Black fusing accidentally. Maybe due to some strange energy anomaly. And then they have to figure out how to control this new form. They might initially be feared by their friends because of Goku Black's reputation, but then they prove that they are on the side of good by using their new powers to protect the Earth from an impending threat that no one else could handle.
Well, perhaps in this fanfiction, Goku Black makes a fatal mistake. He could underestimate Goku's ability to adapt during battle. Goku, being the experienced fighter he is, notices this weakness and uses it against Goku Black. He might use a combination of his signature moves like the Kamehameha in a new and unexpected way that catches Goku Black off - guard, leading to his defeat.
Maybe Trunks could play a role. He has his own experiences with time - traveling and dealing with powerful foes. He could either be an ally or an adversary to her depending on how the story unfolds. Also, Bulma could be involved. She might use her scientific knowledge to either help or try to figure out the secrets related to the daughter of Black Goku.
One possible plot could be that when Goku and Goku Black fuse, they create a being with an incredibly powerful mix of Goku's pure heart and Goku Black's dark power. This new being might initially struggle with the conflicting natures within. They could then face an even greater threat than before, like a new, super - powerful villain that neither Goku nor Goku Black could have defeated alone. As the fused being, they have to learn to control their power and find a balance between good and evil within themselves to defeat this new enemy.
A possible plot could be that Android 18 and Goku are thrown into an alternate dimension where they have to rely on each other to survive. In this dimension, they face challenges that test their friendship and fighting skills. Android 18 might learn some of Goku's signature moves and Goku could learn more about the technology within Android 18.
The plot could start with Vegeta's sister being sent on a mission to Earth. Goku, being the protector of Earth, initially sees her as a threat. But as they interact more, they realize they have a lot in common. They start to explore their feelings for each other secretly. However, Vegeta discovers their relationship and is furious. He challenges Goku to a fight, thinking Goku has betrayed him. In the end, Goku and Vegeta's sister have to prove to Vegeta that their love is real and that it won't harm their relationship as comrades.
A plot might involve Goku accidentally stumbling into Zeno's realm. Zeno, who has only seen beings either fear or revere him, is amused by Goku's lack of fear and his eagerness to spar. So, they start a friendly sparring match that has the potential to either create chaos in the multiverse if they go all out or lead to a new understanding between the two most powerful beings in the Dragon Ball universe.
Maybe Chicbi was captured by an evil force. Goku hears about it and sets out on a rescue mission. When he finally frees Chicbi, they have a heart - to - heart conversation about how much they missed each other. They then decide to train together to become even stronger so that they can prevent such things from happening in the future. During the training, they also have some friendly competitions which strengthen their bond further.
Well, it could start with some sort of interdimensional or magical event that links the Naruto and Dragon Ball universes. Maybe Goku somehow ends up in the Naruto world and has a relationship there, resulting in Naruto being his son. Then Naruto could inherit some of Goku's powers, like super strength or the ability to fly, on top of his own ninja skills. He might use these new powers to face even greater threats in the Naruto world, like stronger versions of the Akatsuki.
One possible plot could be a story of Goku and Android 21 teaming up against a new and powerful enemy. They start off as reluctant allies. Goku is initially wary of Android 21 due to her being an android, but as they face challenges together, they begin to understand and respect each other's powers. They could learn new techniques from one another and in the end, become friends. This would be a great way to show their growth and the power of friendship across different species in the Dragon Ball universe.