Sure. There are some really creative ones. For example, a fanfic could be about a female character who has a special connection with Tyler. She might be a witch and they team up to fight against common enemies in their town. These fanfics often explore different relationships and scenarios that weren't fully shown in the original story.
One common theme is adventure. Since the original story has a lot of elements of exploring haunted places and fighting ghosts, fanfics often continue this adventure - filled spirit.
A must - read is 'Love Against All Odds'. Here, the OC is a human who gets involved with Tyler during all the supernatural chaos in Mystic Falls. It's a slow - burn romance that is full of heartwarming moments. The author does a great job of showing how the OC adapts to the dangerous world around her while falling for Tyler.
Supergirl is a popular character in fanfiction. Writers love to explore her powers, her dual identity, and her relationships. Her superhuman abilities make for exciting action scenes, and her kind heart makes her a beloved hero in many stories.
If Barry kidnapped Supergirl in fanfiction, it could be a really interesting plot twist. Maybe Barry has been affected by some sort of red kryptonite - like substance that makes him act out of character. This would lead to a conflict between the Flash and Supergirl's friends and allies. They would be confused as to why Barry would do such a thing.