A really interesting plot could be where Bruce is kidnapped by an otherworldly force. This could be a group from another dimension that has somehow targeted him. His kidnapping could be part of a larger plan that involves not just Gotham, but the entire multiverse. The Bat - family would then have to figure out how to deal with this new and strange threat while trying to rescue Bruce.
One possible plot could be that Bruce is kidnapped by a new and mysterious criminal organization in Gotham. They might be after his wealth and technology. His friends, like Alfred and the Bat - family members, then start a frantic search for him. Another plot could involve a villain who has a personal vendetta against Bruce Wayne and kidnaps him to publicly humiliate him.
The Joker could be the kidnapper. He's always up to some crazy scheme and kidnapping Bruce would be right up his alley. He might want to torture Bruce both physically and mentally, just for his own twisted amusement.
One possible plot could be that Ino is kidnapped by a rival ninja clan who wants to use her mind - reading abilities for their own gain. Her friends then embark on a dangerous rescue mission, filled with battles and strategic planning.
One possible plot could be where a secondary character from the Twilight series is kidnapped by a new vampire clan that wants to use them as a bargaining chip against the Cullens. This could lead to a series of tense negotiations and action - packed rescues.
One possible plot could be that Kagome is kidnapped by a powerful demon who wants to use her spiritual powers for his own evil deeds. Her friends then embark on a dangerous journey to rescue her. They face various challenges and battles along the way.
One possible plot could be about how they deal with the challenges of their superhero lives while expecting a baby. For example, they might have to face villains who try to take advantage of Diana's pregnancy. Another could be the reactions of their friends and fellow superheroes. Some might be overjoyed and offer support, while others might be worried about how it will affect their crime - fighting abilities.
A third plot idea could be a time - travel fanfic. Bruce and Selina are sent back in time to a key moment in Gotham's history. They have to navigate the past, deal with the different social and political situations of that time, and make sure they don't accidentally change the future of Gotham. This would give a chance to explore their characters in a completely new context and also see how their relationship might have developed in a different era.
In some fanfictions, their kiss might be part of a dream sequence. Selina dreams of a world where she and Bruce can be together without the chaos of Gotham getting in the way. The kiss in the dream is so vivid that when she wakes up, it makes her question her true feelings for Bruce and how she wants to approach their relationship in the real world.
One interesting plot could be the development of an unexpected friendship between the kidnapped character and Draco. Maybe they start to understand each other's motives and past traumas, leading to a change in their relationship from captor - captive to something more complex.
One possible plot could be that Danny is kidnapped by a new ghost enemy who wants to use his powers for their own evil deeds. Maybe this enemy plans to drain Danny's ghostly energy to become more powerful. Another plot could involve Danny being kidnapped by a group of his human enemies who have finally discovered his secret identity and want to experiment on him. Or perhaps a time - traveling villain kidnaps Danny to prevent him from ever becoming a hero in the future.
One interesting plot could be that Link is kidnapped by a group of rogue Sheikah. They believe Link has a special power that can be used for their own gain. His friends then embark on a quest to rescue him. They face various puzzles and enemies along the way. Another plot might be that Link is kidnapped by a powerful sorcerer who wants to use Link's connection to the Triforce. Link has to find a way to escape while his friends try to figure out where he is. Maybe there's a time limit too, adding more tension to the story.