A possible plot could be that Slade has some information that Nightwing desperately needs. In exchange for this information, Slade makes Nightwing go through a series of dangerous trials. As Nightwing progresses through these trials, he starts to understand more about Slade's motives and his own limits. This could also involve some flashbacks to their previous encounters and how they have shaped their relationship.
One idea could be a story where Nightwing has to train Robin in a new and dangerous combat technique. They could face off against a powerful new villain in Young Justice that specifically targets their mentor - protégé relationship.
Maybe there's a situation where a powerful artifact is discovered that has a connection to both Nightwing's family and Starfire's alien heritage. They embark on a quest to understand the artifact's true nature. During this journey, their relationship grows stronger as they face various obstacles and puzzles.
A plot could revolve around a misunderstanding between Nightwing and Starfire. For example, Starfire might misinterpret one of Nightwing's actions as him not trusting her. This could lead to some tension between them at first, but then they would have to work through it and in the process, their relationship could grow stronger. They could have deep conversations about their feelings and past experiences that bring them closer together.
One idea could be that Nightwing has to train the Young Justice team in some new combat techniques. Maybe there's a new threat in Gotham that requires their combined skills to take on. Another could be a time - travel plot where the Young Justice team gets sent back in time and meets a younger Nightwing, and they have to work together to get back to their own time. Or perhaps Nightwing goes undercover in Young Justice to investigate a mole, leading to a lot of mystery and drama within the team.
Good 'Slade Young Justice fanfiction' also has great character interactions. It could be Slade's tense exchanges with Robin, or his more subtle manipulations of other members of the team. These interactions add a lot of drama and intrigue to the story, making it a page - turner for fans of the series.
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.
One plot idea could be that the reader is a new recruit in the Young Justice team. Nightwing takes the reader under his wing to train them. As they train together, they start to develop feelings for each other. Along the way, they face a common enemy that tries to divide the team, and they have to work together to overcome it and in the process, their relationship deepens.
One idea could be a crossover where the Young Justice team has to team up with the Justice League to face an interdimensional threat. Maybe a powerful villain from another dimension is trying to invade Earth and the combined skills and powers of both groups are needed to stop it.
Maybe a story where some of the younger members of the Young Justice team are frustrated with the Justice League's methods and decide to take on a mission on their own, but end up getting in over their heads and have to call in the League for help. This could lead to a lot of character development and some interesting dynamics between the two groups.
One interesting fanfiction could be about Artemis and Nightwing teaming up for a secret mission. They might have to infiltrate a high - security base where their skills complement each other. Artemis' archery and stealth, combined with Nightwing's acrobatics and detective skills, make for an exciting adventure.