You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of Arrowverse fanfictions, and you can easily search for Flash - related ones.
You can expect to see unique interpretations of the Flash's story. Maybe new character developments that the official show didn't explore. It could also have different takes on the relationships between the Flash and other Arrowverse characters.
At first, Flash might be a bit confused. His world is so different from the world of Glee. But as he listens more, he'd start to appreciate the artistry. The emotions expressed through the music would touch him. He might even start to see parallels between the unity and teamwork in the Glee club and the teamwork he has with his own allies in fighting crime. He could then become a big supporter of the Glee club, using his powers to spread the word about their amazing music.
Well, he might be super excited at first. Naruto is always eager to learn new and powerful techniques. Flash Step is a very cool and useful ability, so he'd probably be like a kid in a candy store, full of energy and anticipation, ready to master it as soon as possible.
The Arrowverse takes inspiration from the comics, but it's not a one-to-one canon. Writers and producers make choices to create a unique and coherent TV narrative, which means not all comic details are followed precisely.
They often explore deep emotional connections between male characters. For example, they might show how two characters support each other through tough times in the Arrowverse.
No, it's not appropriate. The Arrowverse is a franchise that is aimed at a wide audience, including younger viewers. Writing sex fanfic goes against the family - friendly and heroic nature of the Arrowverse. It's better to write fanfic that focuses on positive aspects such as character development, heroic deeds, and the exploration of the complex relationships between the superheroes in a non - sexual way.
The characters would have a range of reactions. Barry (Flash) would probably be very protective. He's a hero who helps people, and Kara is his friend. He'd likely offer his speed and any resources he has to keep her safe. Kara's friends on Supergirl's side, like Alex, would be shocked at first but then become very supportive. They might start planning how to protect Kara and the baby from all the threats they face in their world.
The more perceptive friends like Batman might notice the change in their dynamic right away. He'd probably keep an eye on them to make sure it doesn't interfere with their work as heroes. Others like Aqualad might be a bit surprised at first, but then be happy for them. He'd understand that their relationship could bring out the best in both of them.