One idea could be to create a fanfiction where the characters are in an alternate universe where the Grimm are not the main threat but rather a new type of mechanical enemy. Another could be to focus on a backstory for a minor character, like how they got into Beacon Academy. And a third idea is to do a roleplay fanfiction where the teams have to work together in a different kind of tournament, not the Vytal Festival.
One idea could be exploring what would happen if a new vampire with a unique power entered Forks. This new vampire could disrupt the existing relationships between the Cullens and the other characters in Twilight. For example, they might have a power that could temporarily nullify the abilities of other vampires, leading to some tense and interesting situations.
One idea could be a time - travel plot where a modern - day Naruto fan gets transported into the Naruto world. They could use their knowledge of the series to change certain events. Another could be a story where Naruto has a secret power that he has to hide from everyone, even his closest friends. It would add an element of mystery to his character.
A pirate and a mermaid is a great roleplay for kids. The pirate is sailing the seas and accidentally comes across a mermaid. The mermaid can be friendly or a bit mischievous, and the pirate has to figure out how to deal with this new encounter.
A teacher - student roleplay story can be interesting. The 'teacher' imparts some made - up knowledge to the 'student' in a classroom - like setting. Also, an astronaut and a mission control operator roleplay. They communicate about a fictional space mission, with the astronaut reporting from 'outer space' and the operator guiding from Earth.
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 explore a crossover between RWBY and Darkwatch characters. Maybe Ruby could team up with a Darkwatch hunter to fight a new kind of Grimm that has some vampiric abilities. This would create a really unique dynamic as they combine their different fighting styles and powers.
One idea could be focusing on team strategies for different combat scenarios in RWBY. For example, how Team RWBY might plan to take on a powerful Grimm that has unique abilities. Another could be about the strategic use of Dust in battles, like creating new combinations or ways to deploy it for maximum effect. And a third idea could be exploring the strategic alliances and rivalries between different teams at Beacon Academy.
One idea could be to have Ainz Ooal Gown from Overlord end up in the RWBY world. He could be seen as a powerful new force, and his magic and strategic mind would create a lot of interesting scenarios. Maybe he'd form an alliance with one of the academies, or be seen as a threat by Salem and her forces.
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.