It's also possible that Nightwing and Slade end up having a long conversation during the captivity. Slade might try to convince Nightwing to join his side, perhaps by appealing to some sense of justice that he thinks Nightwing is missing. Nightwing, of course, would resist, but this could lead to some interesting character development for both of them as they debate their different ideologies.
In the fanfiction, Nightwing could be used by the Joker as bait to lure Batman into a trap. The Joker might have some elaborate and sadistic plan in store for both of them. Nightwing, being the strong - willed character he is, will likely try to resist the Joker's psychological games and attempts to break him while waiting for rescue.
Well, in a fanfiction where YJ Robin is kidnapped by Slade, one possibility is that the other members of the Young Justice team would immediately start a rescue mission. They would use their unique skills and powers to track down Slade's hideout. For example, Aqualad might use his connection to the water and sea life to gather intel, while Superboy could use his strength to break through any barriers in their way. Robin himself would likely be using his wits to try and outsmart Slade from within the captivity.
One possibility is that Red Hood has some sort of vendetta against Nightwing. Maybe he blames Nightwing for something that happened in the past, like a mission gone wrong that affected someone close to Red Hood. So he kidnaps Nightwing to get revenge or to make him pay in some way.
He might try to engage Slade in conversation. Nightwing is smart and could be looking for a way to psychologically get an edge over Slade. He could be probing for Slade's motives, hoping to find a way to turn the situation around. He might also be stalling for time, waiting for the right moment to make his move.
In this kind of fanfiction, Robin might be in a lot of danger. Slade could be using Robin to get to Batman. He might try to brainwash Robin and turn him against his friends. For example, he could lock Robin in a secret lair and show him false information about Batman to make Robin question his loyalty.
One possible motive could be revenge. Maybe Nightwing has thwarted Slade's plans in the past, and Slade wants to get back at him. Another could be that Slade sees Nightwing as a valuable asset. He might plan to use Nightwing's skills for his own evil purposes, like forcing him to steal something or gather information for him.
Well, in a fanfiction like this, Naruto might be in for a tough time. Pan could be from some other universe and have her own motives. Maybe she wants to use Naruto's powers for her own gain. It could lead to a really strange adventure where Naruto has to figure out how to escape and get back to his own world.
One possibility is that Robin, being kidnapped, will have to rely on his own wits and skills he has learned from Batman. He might try to outsmart the Joker by finding weak points in the place where he is held captive. For example, if it's an old warehouse, he could look for ways to escape through the ventilation system or by using some tools he might find around. And the Joker, being the unpredictable villain, could be constantly taunting Robin, trying to break his spirit before Batman arrives.
First of all, the setting of the kidnapping is crucial. Is it in a desolate desert or a crowded city? If it's in a city, there might be more chances for Tim to signal for help. In this fanfiction, the outlaws could also have their own backstories that led them to kidnap Tim. For example, they might think Tim is involved in something that affected their group negatively. As the story progresses, Tim could discover some secrets about the outlaws that could either help him escape or make his situation worse.
Perhaps Itachi sees Naruto as a key to unlocking some hidden power or knowledge. He could be planning to train Naruto in some way, away from the influence of the village. This would be a strange turn of events considering their previous interactions.