There could be a fanfiction where a Gem from Homeworld discovers the beauty and freedom on Earth and decides to rebel against the traditional ways of Homeworld. This could involve making friends with the Crystal Gems and learning about love and acceptance in a new way. For example, they might start to question the purpose of the Gem hierarchy and fight for equality among all Gems.
Yellow Diamond is also quite popular. She represents the power and authority of Homeworld. Fanfictions might focus on her character development, for example, showing a softer side of her or exploring how she came to be so strict in her rule. Her interactions with other Diamonds and her role in the overall hierarchy of Homeworld are interesting aspects to write about.
A time travel fanfiction could involve a character other than Steven, like Connie. She could travel back in time to meet Rose Quartz. This would be an interesting encounter as Connie could ask Rose about her past, her relationship with Greg, and her hopes for Steven. It could also create a situation where Connie has to make sure she doesn't accidentally change the past in a way that would harm the present.
In 'Steven Universe Watch the Future fanfiction', Steven is bound to be a central figure. He's the protagonist of the original series, after all. Alongside him, the Crystal Gems - Garnet, Amethyst, and Pearl - are very likely to be main characters. They've been with Steven through thick and thin. Additionally, characters like Peridot, Lapis Lazuli, and Bismuth, who have become important parts of Steven's life in the later parts of the series, could also be main characters. Connie, with her connection to Steven and her own growth in the story, is also a strong candidate for a main character.
If it was a crossover with "She - Ra and the Princesses of Power", Adora could be a main character. Her strong leadership and the power of She - Ra would be an interesting contrast to Steven's more laid - back leadership style. Together, they could fight against a common enemy that threatens both their worlds.
One idea could be a crossover with "Adventure Time". Finn and Jake could visit Beach City and interact with the Crystal Gems. They could go on a mission together to stop a new threat that combines the magic of both universes.
One common theme is self - discovery. When a character travels through time, they often learn more about themselves. For example, Steven might travel back to a time when he was younger and realize how much he has grown. Another theme is fixing past mistakes. Maybe a character goes back to prevent a certain event that had negative consequences in the future.
In the context of the show's universe, it's a bit of a strange concept. Since fanfiction exists in our real - world fandom and not in the show's world directly. But if we were to imagine a meta - situation where he could access it, I suppose it could be possible. However, it would be a very surreal situation for him.
He would probably have a very mixed reaction. On one hand, seeing how fans view his world and his story could be really cool. He might enjoy seeing different versions of himself and his friends. However, if there are inaccuracies or things that go against his values in the fanfiction, he could also be a bit put off. It really depends on the nature of the fanfiction he's reading.
Perhaps in the 'Steven Universe Watch the Future fanfiction', there could be a plot where Steven travels to a different dimension within the Gem universe. In this dimension, the rules are different, and he has to adapt quickly. He meets alternate versions of his friends who have different personalities or powers. This could lead to a self - discovery journey for Steven as he sees how different choices could have led to different outcomes. He then has to find a way to bring back something from this dimension that can help save his own world from a brewing disaster.