One interesting concept could be the power dynamics. Since Black Goku is a powerful and often malevolent version of Goku, exploring how their powers interact in a fanfiction can be exciting. For example, they might have an epic battle where their similar yet different fighting styles clash.
Character development is also crucial. In many such fanfictions, Female Goku Black may start as a villainous or at least antagonistic character. But as the story unfolds, she might change due to her interactions with Goku. This transformation can be really interesting to follow. For example, she could start to question her own motives or even develop feelings for Goku, which is a big shift from her initial stance.
" Sister Li's Bastard Superpower World " was a web novel. The story was set in a different environment from the real world. Everyone had a superpower, but these superpowers might not be practical. There were all kinds of strange superpowers in the story, such as special effects caused by specific actions at specific times and places, or 39 consecutive backflips that would cause death and soul separation. The plot of this novel was very imaginative, funny, and interesting. The author had added many unexpected elements to it. However, other than this information, the given search results did not provide more specific content and explanations about Sister Li's Bastard Superpower World.
As the story progresses, some fanfictions might explore a begrudging respect. Despite their differences, they recognize each other's power and fighting abilities. For example, they could have a series of battles where they start to understand each other's strategies better.
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.