One interesting idea could be the redistribution of resources in the RWBY universe. For example, Dust, which is a crucial resource, might be shared more equally among the kingdoms. This could lead to a more balanced power structure and less inequality between the rich and the poor. Another aspect could be the role of the Huntsmen and Huntresses. In a communist - inspired RWBY world, they might work more for the collective good rather than for individual glory or profit. They could be more focused on protecting all people equally, regardless of their social status or wealth.
In RWBY communism fanfiction, a cool concept could be the elimination of class differences among the various races in the RWBY world. Faunus, for instance, might no longer face discrimination and would have equal opportunities in all aspects of life, such as education and employment. The academies like Beacon could be run in a more democratic and inclusive way. Also, the idea of cooperation between kingdoms could be emphasized more. Instead of competing for resources and power, they would collaborate, sharing knowledge and technology for the betterment of all. This would change the whole dynamic of the story's world - building.
One interesting idea could be a crossover of different timelines within RWBY. For example, characters from the past meet the current ones and have to deal with the differences in their worlds. Another could be a crossover of different teams in unexpected ways, like Team RWBY having to team up with a rival team to face a common enemy that is more powerful than any they've faced before. And sometimes, there are crossovers that involve alternate versions of the characters, where their personalities or abilities are slightly different, which can lead to very unique and engaging storylines.
One idea could be to have Gilgamesh as a powerful ancient being who awakens in the RWBY world. He could initially be seen as a threat but then form an unlikely alliance with the main characters. For example, he might offer his knowledge of ancient magic to help them fight against a new, powerful Grimm.
One idea could be that the Slenderman somehow enters the RWBY universe during a Grimm attack. The characters of RWBY initially mistake him for a new type of Grimm. But as they start to investigate, they realize he has very different and more sinister powers compared to the Grimm.
An OC in RWBY fanfiction could be a character who is a master of stealth. They could use their skills to gather intelligence for the teams at Beacon Academy. Their backstory could involve growing up in a family of thieves, but they decided to use their abilities for good. They might have a Semblance that allows them to become invisible for short periods of time, but it has a drawback like draining their Aura quickly. This OC could interact with characters like Blake, who also has some stealth - like abilities, and they could learn from each other.
For RWBY OC fanfiction, you could make an OC who has the power to manipulate time on a small scale. This would be a really cool ability in battles, being able to slow down opponents or speed up oneself. Another idea is to have an OC that is a faunus with a very rare animal trait, like a phoenix - like faunus. Their story could revolve around hiding their true nature because of discrimination. And an OC that is a transfer student from a far - off land with a completely different fighting style compared to the students at Beacon Academy would also make for an exciting story.
Some fanfictions in RWBY Evolution might focus on unique Grimm designs. They could introduce new types of Grimm with special abilities that the main characters have to face. Also, there could be fanfictions that change the setting, like placing the RWBY world in a different time period, say a post - apocalyptic version of Remnant where the Huntsmen and Huntresses have to deal with even more challenges.
One idea could be a crossover where Goku somehow ends up in the RWBY universe. He could train the RWBY characters, sharing his martial arts knowledge and helping them improve their combat skills. For example, he could teach Ruby how to better control her speed and use her scythe more effectively in combat.
Perhaps a story where a Xenomorph egg is accidentally brought to Vale. Then, as the Xenomorph starts to grow and hunt, the Huntsmen and Huntresses in training, including the RWBY girls, have to figure out how to stop it before it spreads chaos throughout the city. They would face challenges as the Xenomorph's acidic blood could damage their weapons and the environment around them.
One interesting idea could be the characters being reincarnated with different abilities or in different kingdoms. For example, Ruby could be reincarnated in Atlas and have to adapt to their high - tech combat style while still retaining her scythe - wielding skills. Another idea might be the reincarnation of villains as heroes or vice versa, which would completely change the power dynamics and relationships in the RWBY universe.
A great concept for 'rwby expansion fanfiction' is to introduce new kingdoms or regions in the RWBY world. Describe their unique cultures, fighting styles, and Dust usage. You could also write about a character from one of these new areas coming to Vale and interacting with the main RWBY cast, bringing with them new knowledge and perspectives.