Perhaps a plotline where Superboy has some sort of identity crisis, and Black Canary is there to guide him. She has experience with mentoring young heroes, and she could help Superboy understand his place in the world, whether he's more human or more Kryptonian, and how to embrace both sides of his heritage.
A plotline could involve Black Canary having to protect Robin when he's in a vulnerable state. Maybe Robin gets injured during a mission and Black Canary takes it upon herself to keep him safe while also trying to figure out who targeted him. This would explore their dynamic as she has to be both a protector and a detective of sorts, and Robin has to learn to trust her completely in this situation.
A great plotline could involve Superboy and Superman teaming up against a powerful new villain that neither could defeat alone. They would have to learn to work together and trust each other fully. This would show their different fighting styles and how they complement each other. For example, Superman's experience and calmness in battle could balance out Superboy's more impulsive nature.
Superboy is often brash and impulsive, while Black Canary is more level - headed and experienced. In fanfiction, their personalities can clash at first. For example, Superboy might rush into a fight without a plan, and Black Canary would have to reel him in. But over time, they can learn from each other. Superboy could learn to think before acting from Black Canary, and she could be inspired by his fearless nature.
Romance can also be a theme, although it might be a bit less common given their different backgrounds. But in some fanfictions, the authors explore the possibility of a relationship between them. Also, there are fanfictions that focus on family - like relationships, with Black Canary acting as a mother - figure or an older sister - figure to Superboy.
In Superboy and Black Canary fanfiction, their relationship can be developed in various ways. It could be a mentor - mentee relationship. Black Canary, being more experienced, could teach Superboy about the nuances of fighting on Earth and how to better control his powers. Or it could be a friendship based on mutual respect for each other's abilities. They might start off as strangers and gradually come to trust and rely on one another.
In this fanfiction scenario, Black Canary adopting Superboy could bring a lot of interesting dynamics. Black Canary could teach Superboy about self - control and discipline. She has her own unique fighting style and combat knowledge which she could pass on to him. Also, she could offer him a more stable and nurturing home environment compared to what he might have had before.
A possible plot is that Superboy discovers a hidden vampire community in his city. The vampires are being hunted by a group of anti - vampire vigilantes. Superboy has to decide whether to side with the vampires or the vigilantes. If he sides with the vampires, he'll have to protect them from the vigilantes who think all vampires are bad. And if he sides with the vigilantes, he'll be going against his own sense of justice because he'll learn that some of the vampires are just trying to live peacefully. Another plot could be a vampire using their powers to manipulate Superboy's mind, but Superboy's strong will eventually breaks free, and then they form an unlikely alliance.
One interesting storyline could be Superboy and Supergirl teaming up to face a new and powerful villain that the Justice League has overlooked. They might discover a hidden threat in Smallville that has ties to Krypton's past.
There are fanfictions that focus on a time - travel plot. For instance, Artemis goes back in time and meets a younger Black Canary. They end up teaming up to change an event in the past that has consequences for the present. This type of fanfiction plays with the idea of their different generations and how their skills could be combined in a unique situation.
There might be a fanfiction where the sidekick has to step up in Black Canary's absence. Maybe they have to lead a mission and overcome their insecurities. This could involve them using the techniques and wisdom that Black Canary has taught them.