Another possibility is that it focuses on the technological future of the Arcane universe. The story could be about how new inventions in Piltover are going to change the relationship between the two cities. There could be a scientist character who watches the future of technology and tries to either encourage or prevent certain advancements based on what they see.
Vi could be the main character. She's strong - willed and has a connection to both Piltover and Zaun. In a future - watching scenario, she could use the knowledge to protect those she loves and bring about peace between the two areas.
In Arcane fanfiction, characters might watch various things. It could be the rise and fall of different factions in Piltover and Zaun. For example, they could be observing the power struggles between the chem - barons in Zaun or the political manoeuvres in Piltover's council. They might also watch the technological advancements that are constantly taking place in Piltover, like the creation of new Hextech devices. Another possibility is that they watch the relationships between different characters develop, such as the complex bond between Vi and Jinx.
There are several places where you might be able to find Arcane fanfiction to 'watch' (although typically you read fanfiction). Archive of Our Own (AO3) is a great source. It has a large collection of fan - created works related to Arcane. You can simply search for 'Arcane' on the site and explore the various stories available. Another option could be FanFiction.net, which also hosts a wide range of fan - made content including for Arcane.
Another great way is to engage with the Arcane fan community. Join groups on social media platforms like Facebook or Discord dedicated to Arcane. Fans in these groups often share their own fanfiction or know where to find the best ones. They might also be aware of any projects that are turning fanfiction into something more watchable, like short films or animated series. By being part of the community, you get access to insider knowledge and can discover some really interesting fan - created content related to Arcane.
Perhaps the Marauders watch the future and are shocked to find out that some of their group won't survive the upcoming wizarding wars. They might then start to take extra precautions and train harder to change that future. They could also see new friendships and alliances being formed in the future that they then try to encourage in their own time.
The main plot might center around a mystery that the ASL group stumbles upon in this future setting. It could involve a missing piece of technology or a person who holds the key to a new world order. They then have to navigate through a complex web of clues and face various antagonists who don't want them to uncover the truth. This would involve a lot of action, some tense moments of near - discovery and setbacks as they slowly piece together what's really going on.
One idea could be that Ladybug and Chat Noir face a villain who can manipulate time in the future. This would force them to not only fight in the present but also find a way to prevent the villain from causing chaos in the future. Another plot could involve a new Miraculous holder from the future coming back to help them in their present battles, bringing with them new powers and a different perspective on their fight against evil.
One idea could be exploring an alternate ending where the characters find a way to break free from the game's cycle without any deaths. Another could be a story focused on the backstories of the characters that were not fully explored in the original, like how they ended up in the situation of the game in the first place.
Maybe in this fanfiction, The Flash watches a future where Central City is in ruins because of a new type of meta - human threat that he has never faced before. So he starts training in the present to develop new powers or techniques to be able to combat this future threat. He could also try to find and recruit other meta - humans who might be able to help him in the future fight.
A possible plot in the fanfiction could be a time - travel twist. What if a character goes back in time to prevent the events of 'Danganronpa Watch the Future' from ever happening? This would change the entire dynamic of the story and relationships between characters. Or, the fanfic could focus on a romance that was only hinted at in the original. It could develop the relationship between two characters who had a lot of unspoken chemistry.