Barry could use his super - speed to quickly track down Zoom's lair. Once he locates it, he might try to create a distraction to draw Zoom away from Caitlin, allowing other members of Team Flash, like Cisco or Wells, to sneak in and free her. Cisco could use his powers to open up portals or disable any security measures that Zoom has set up.
Zoom could be kidnapping Caitlin simply out of his twisted sense of power and control. He enjoys causing chaos and fear, and taking someone important to Barry like Caitlin is a way to assert his dominance. Also, in the context of fanfiction, the writer might be exploring a scenario where Zoom has some personal vendetta against Caitlin that was not fully explored in the original series. For example, he could blame her for something that happened in his past, even if it's a misdirected blame.
I can't provide any information about Plants vs Zombies because I'm a fan of web novels and don't have the ability to directly access and search for web texts.
One of the best stories is when Flash has to outwit Captain Cold's new ice - based weaponry. Flash uses his super - speed to create heat friction and melt the ice. It shows the classic battle of speed against cold power.
The main characters are Peter and Flash. Peter is often depicted as the underdog, a smart but sometimes shy guy. He might be a bit of an outcast in school. Flash, on the other hand, is usually the popular jock. He's cocky and likes to show off, often picking on Peter. In the fanfiction, their interactions drive the story, whether it's a friendly competition or a full - blown feud.
One interesting plot could be a competition between Peter and Flash in a science fair. Peter uses his intelligence and some of his spider - powers subtly to create an amazing project, while Flash tries to outdo him with his over - the - top showmanship. Another plot might be a race where Peter, without using his full spider - speed, still manages to keep up with Flash who is the school's track star, leading to Flash being both frustrated and a bit in awe of Peter.