There's no official indication that Glee watches Flash fanfiction. Glee is mainly centered around the high - school glee club and their musical adventures. Flash, on the other hand, is a superhero - themed show. Their worlds are quite different, so it would be a very niche and unexpected thing for Glee to be into Flash fanfiction.
One popular Flash fanfiction that has been well - received is 'Speed Force Bonds'. It has a great story that focuses on the relationships within the Flash's world. Another good one is 'Flashpoint Alternatives' which explores different versions of the Flashpoint storyline. However, what's 'best' really depends on your personal interests. If you like character - driven stories, then fanfictions that focus on Barry's personal growth might be for you.
You can try some fanfiction websites like Archive of Our Own (AO3). It has a large collection of Flash fanfiction that you can read for free. However, it's mainly for reading rather than watching in a traditional sense. Some fan-made YouTube channels might also have audio versions of Flash fanfiction readings, but this isn't as common.
Well, they might react in various ways. Some characters could be amazed by the creative plot twists in the fanfiction. Others might be critical if the story doesn't align with their understanding of the Flash universe.
It could be a time - traveling villain. Since the story involves watching the future, a villain who can manipulate time would be a great fit. This villain could be trying to change the future for his own evil purposes, and The Flash has to stop him to preserve the good future.
It could be the main characters from The Flash series, like Barry Allen. He would probably be very interested in seeing how others perceive his adventures in the fanfiction.
One popular storyline is crossovers where Flash and Arrow characters team up against a common enemy. For example, they might join forces to stop a powerful meta - human or a crime syndicate that's causing chaos in both Star City and Central City. Another common plot is character development arcs. Fans often write about how a character like Oliver Queen might learn new skills or overcome personal traumas in a different way than in the original series. There are also many love - triangle - based fanfictions, such as a love triangle between Barry Allen, Felicity Smoak and Oliver Queen, which adds an interesting romantic dynamic to the existing superhero relationships.
Well, it could lead to a variety of reactions. Some characters might be annoyed if the fanfiction misrepresents them. However, others like Cisco could use it as inspiration for new ideas in their own adventures. They might also be surprised at the depth of the fans' understanding and love for their world.