Their relationship can be developed through shared experiences. For example, if they are on a dangerous mission and have to rely on each other to survive. Superboy could use his strength to protect Zatanna from physical threats, while Zatanna uses her magic to get them out of tricky situations. Another way is through communication. They could start by having small conversations about their different worlds, Superboy's Kryptonian heritage and Zatanna's magical upbringing. This would lead to a deeper understanding and respect for each other, gradually developing their relationship.
You could also develop their relationship through personal growth. Suppose Superboy is learning about his Kryptonian heritage and Wonder Girl is training to be a better leader. They can support each other in these individual quests. Wonder Girl could help Superboy understand the values of his heritage, and in return, Superboy can give her advice on leadership based on his own experiences. This mutual support would deepen their relationship.
One plot idea could be that Superboy and Zatanna are sent on a mission together to a magical realm. There, they have to combine Superboy's strength and Zatanna's magic to defeat an ancient evil. Another could be a story where Zatanna accidentally casts a spell on Superboy that gives him temporary magical powers, and they have to figure out how to reverse it while also dealing with villains who want to use Superboy's new powers for their own gain. A third idea is that they discover a connection between Kryptonian technology and ancient magic, and they must work together to stop a mad scientist from misusing this knowledge.
Their relationship also has the potential to be a mentorship of sorts. Superboy, having been part of the hero world longer, can offer advice to Static on dealing with the media and public perception. Static can show Superboy how to better connect with the civilian population, as he has more experience on the streets.
Their relationship can be developed through shared challenges. For example, when they are stuck in a difficult situation like being trapped in an enemy's lair. They have to communicate, trust each other, and use their combined skills to escape. This would strengthen their bond.
In a story, their relationship could develop by having them face life - or - death situations together. When they are in a tight spot, they have to rely on each other's skills. For instance, if they are trapped in a collapsing building, Red Arrow uses his archery skills and Cheshire her agility and martial arts to escape. This mutual dependence can strengthen their connection. Also, they could be forced to protect each other's families, which would add an extra layer of complexity and depth to their relationship.
Their relationship can be developed through training sessions. Superman can teach Conner new techniques and powers, and in the process, they can bond over their shared Kryptonian heritage. For example, Superman could show Conner how to better control his heat vision.
Another way is by introducing a third party that threatens their relationship. For example, a new hero comes in who tries to take Robin under their wing. Nightwing then has to prove why he is the better mentor. This would create some drama and further develop their relationship as they work through this new situation.
Another way is through shared experiences. Let's say they both get caught in a time - travel anomaly. They have to rely on each other to find their way back to their own time. During this adventure, they learn about each other's fears, hopes, and dreams. This shared experience could be the catalyst for a deeper connection between them, whether it's a friendship based on mutual understanding or a more complex relationship.
One way is to explore their shared past. Maybe there were some events that they both were involved in but saw from different perspectives. By delving into these past events in the fanfiction, it can add depth to their relationship. Also, introducing a third party that forces them to interact in new ways, like a mutual enemy that they have to deal with together. This can lead to some unexpected developments in their relationship, such as a temporary truce or a new understanding of each other's motives.
Through shared experiences. For instance, they could go through a tough training session together where they learn new skills from each other. Nightwing could teach Starfire some of his stealth techniques, and she could show him new ways to use his acrobatic skills in combat. This mutual learning would create a bond between them.