One possibility is that Naruto's friends would immediately launch a rescue mission. They would likely gather intel about Kumo's motives and whereabouts. For example, Sasuke might use his Sharingan to track any clues left behind. Sakura would prepare medical supplies in case of injuries during the rescue.
Maybe Naruto would find a way to escape on his own. He's known for his resourcefulness. He could use his shadow clones to create distractions and then make a run for it. Also, he might try to befriend some of the captors in Kumo and convince them to let him go.
Well, one possibility is that Naruto's friends would immediately start a rescue mission. They'd gather all the intel they can about Kumo's defenses and where Naruto is being held. Maybe Sasuke would put aside his differences for the time being and team up with the others.
Well, Naruto might use his Nine - Tails chakra to break free. He's a tough one. He could also try to outwit Orochimaru with his ninja skills. Maybe he'd pretend to be unconscious and then surprise Orochimaru when he least expects it.
In this kind of Yaoi fanfiction scenario, one possible thing that could happen next is a lot of emotional turmoil. Sasuke might have kidnapped Naruto for reasons related to his own inner demons or some misconstrued idea of protecting him. Naruto, being kidnapped, would initially be angry and confused. He would try to reason with Sasuke, leading to some intense dialogues that could explore their complex relationship. There could also be a moment where Naruto starts to understand Sasuke's motives a bit more, which might lead to a change in their dynamic, perhaps even towards a more affectionate connection as is often the case in Yaoi stories.
Well, one possibility is that Naruto could quickly rise through the ranks in Kumo. Since he was neglected at home, he might be more determined to prove himself there. He could form strong bonds with new friends and comrades in Kumo who actually value him, which would be a huge change from his situation in his original village.
In a fanfiction where Esdeath kidnaps Tatsumi, one possibility is that she tries to force him to join her side. She might use various means like threats against his friends or promises of power. Tatsumi, being a hero at heart, would likely resist. He could try to escape while also trying to figure out Esdeath's weaknesses to defeat her later.
Well, in a typical scenario, Sonic would probably rush to save Tails. He'd use his super speed to track Eggman's lair. Maybe he'd find some clues along the way, like a piece of Tails' fur or a gadget that Eggman accidentally dropped. Then, Sonic would face off against Eggman's badniks, defeat them one by one, and finally reach Tails. He'd free Tails and they'd escape together, with Eggman vowing revenge as usual.
Another scenario could be that Naraku has some ulterior motive for kidnapping Kagome. Maybe he wants to use her spiritual powers for his own evil purposes. He could try to corrupt her or force her to use her powers against Inuyasha and the others. But Kagome would resist with all her might, and her love for Inuyasha and her friends would give her the strength to hold out until they come to her rescue.
In a scenario where Orochimaru kidnaps Hinata, the Hyuga clan would surely get involved. They'd be outraged and use all their resources to find her. Orochimaru might be interested in Hinata's Byakugan for his experiments. He could try to extract its power or study it. But Hinata has been trained in the Gentle Fist style, so she might be able to hold her own against Orochimaru's minions for a while. And who knows, Sasuke might also get involved. He has his own history with Orochimaru and might see this as a chance to confront him again, especially if he realizes that an innocent like Hinata is in danger.
Well, one possibility is that Elena's friends would immediately start a search party. Damon, for instance, would be furious and stop at nothing to find her. He might enlist the help of Stefan and Bonnie. They could use Bonnie's magic to try and track Klaus' whereabouts.
Another aspect could be the emotional turmoil for the other Avengers. They would surely be scrambling to find Tony. Captain America might feel especially guilty, considering their past differences. The team would have to put aside their differences completely to rescue Tony. They might start by gathering intel on Thanos' whereabouts and formulating a plan that involves their unique skills. For example, Black Widow could use her espionage skills to infiltrate Thanos' base, while Thor could provide the brute force needed in a direct confrontation.