Let's note that I started writing this the moment I uploaded the last chapter. We'll see how long it takes to write it all.
Nightwing was on patrol when he received the notification from the Watchtower that the rest of the Young Justice team had been kidnapped. He slowed his jumps over the rooftops until he was on the highest in the city. Standing still, he stared up at the moon, contemplating.
He had spent enough time working with Slade that he knew what the man was trying to do. By holding the team hostage, Slade had one end goal in mind. To get him to return. Capturing the Young Justice team for the Light was just an added benefit.
Sitting with his legs hanging over the side of the building, he squeezed his eyes shut, remembering the first time he had been with Slade.
He had been taking during a mission that should have been cut and dry, spy on a gang that was possibly kidnapping metahumans, do not engage, report back as soon as they found anything. Of course, it had all gone up in flames, as their mission always tended to. As the team fought, Robin hacked their computer systems, trying to find proof of the kidnappings, when everything went black.
The gang had been kidnapping metahumans and turning them over to the Light for some unknown reasons. However, to "protect their assets," the Light had hired Slade, Deathstroke the Mercenary, as additional security. Slade had always had an interest in Robin, everyone knew it in the hero and villain communities, so when the opportunity arose, Slade took Robin, blew up the computers so there was no evidence that he was involved, and left.
But Slade knew that this wasn't enough for Robin to give in. No matter how terrible he was treated, how hard they trained, Robin was never going to be loyal, was never going to give in and stop trying to get away. So Slade threatened his brothers, planting nanobots in their bloodstream that he could use to hurt them, or even kill them. And while Robin never really cared what happened to himself, he would do anything to protect his brothers.
Until Robin injected himself with the nanobots, making it so if Slade killed his brothers, he killed his asset as well. But, once again, Slade outsmarted him. Knocking him out, Richard woke up in a cell, with his brothers there as well. The rest was history.
Taking a shaky breath, he read the notification again. Young Justice has been captured. You know Deathstroke the best. Please report to the cave. Bring your partners. Staring at the message, he sighed. Standing, he sent a message to Jason saying that he was following up on a lead, and that he was staying late, to not wait up before sliding the communicator away and making his way to the Zeta Beam.
His old mentor had always sworn that they were not done with each other, that one day, Richard would come crawling back to him, begging his master to take him back. It looked like he was right.