Another plot could involve Nightwing trying to reform Deathstroke. He believes there's good in him still and attempts to bring out that side through a series of intense encounters and conversations. For example, they could be forced to work together against a common enemy and during that time, Nightwing tries to get through to Deathstroke.
A more complex plot could be set in an alternate universe where Deathstroke and Nightwing are on opposite sides of a war. However, they share a secret connection that neither of them fully understands at first. As the story progresses, they start to question their allegiances and the true nature of their relationship.
One interesting story could be where Nightwing and Deathstroke are forced to team up against a greater evil. They have a lot of animosity between them, but they realize they need each other's skills to survive. Nightwing's acrobatic fighting style combined with Deathstroke's strategic and brutal combat could make for some great action scenes.
A different plot could be that the reader has some sort of special power that Nightwing needs to help him in a big battle against a powerful super - villain. They team up, and during their time together, they discover they have a lot in common. The reader might be initially hesitant about using their power, but Nightwing encourages them, and this shared experience brings them closer together.
One idea could be a story where Nightwing has to take over Batman's duties temporarily in Gotham. He faces a new villain who is specifically targeting Batman's absence and Nightwing has to prove himself not just as a replacement, but as a hero in his own right.
One idea could be a story where Baby Nightwing is discovered by the Justice League. They have to figure out how to take care of him while also protecting him from villains who might want to use him. Another could be a time - travel story where an older hero goes back in time and meets Baby Nightwing, and has to ensure his safety so that the future doesn't change.
A great plot could be that there's a new vampire in Gotham who is creating chaos by turning innocent people into vampires. Nightwing, with his detective skills, starts to investigate. As he gets closer to the truth, he discovers that the vampire has a personal vendetta against him. It could be an old enemy who was turned into a vampire and now wants to make Nightwing's life a living hell.
One idea could be that Robin is on a solo mission and Deathstroke is hired to stop him. Robin has to use his wits and agility to outmaneuver Deathstroke's superior strength and experience. Another could be that Deathstroke, for some reason, decides to train Robin secretly, leading to a complex relationship between the two where Robin is conflicted about learning from an enemy.
Maybe Harley Quinn discovers some dark secret about Nightwing's past that she uses to blackmail him into helping her with a heist. But as they work together, they start to understand each other better. Nightwing realizes Harley isn't all bad and Harley sees that Nightwing has his own demons. In the end, they might even become friends or something more.
A great plot could involve Nightwing training a new generation of heroes in the 'Batman Beyond' universe. He could share his old - school combat techniques with the more tech - reliant heroes, leading to some interesting clashes and growth. For example, he might have a hard time getting used to the new gadgets while the younger heroes struggle with his more hands - on combat style. And together they have to face a villain who is exploiting their differences.
A really interesting plot could be that there is a prophecy stating that only the combined efforts of Nightwing and Wonder Woman can save the world from a new, powerful threat. This threat could be a dark force that corrupts other superheroes, and they have to find a way to stop it without getting corrupted themselves. They would need to use their different combat styles and personalities to their advantage. Nightwing's agility and street - smart thinking combined with Wonder Woman's strength and wisdom would make for an exciting story. Also, perhaps there is a mystery involved, like they need to find a hidden artifact that can help them defeat the threat. Along the way, they could meet new characters or encounter old enemies in unexpected ways.
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.