It could be a powerful Grimm that has evolved during the 'New Divide'. This Grimm could have the ability to manipulate the minds of other Grimm, making them even more dangerous. It could target the main characters specifically, seeing them as a threat to its newfound power.
Another plot idea could be to focus on the relationships between the RWBY characters during this 'New Divide'. Maybe there are internal conflicts within the teams because of the stress and danger. For instance, Ruby might start to doubt her leadership abilities, and this could cause a rift between her and Weiss. The fanfic could then be about how they overcome this and strengthen their bond again.
You can start by brainstorming an original concept that fits within the RWBY universe. Maybe think about creating a new character with a unique backstory and abilities. For example, a character from a far - off kingdom who comes to Beacon Academy with a secret mission.
Well, a new Overlord RWBY fanfic might feature unexpected crossovers between the two universes or explore previously unexplored character relationships. It could also introduce new villains or challenges for the heroes to overcome.
I'm not sure specifically as I haven't read it. But generally, a RWBY fanfic might be about the adventures of the main characters from RWBY. It could involve new quests, battles against Grimm, or developments in the relationships between Ruby, Weiss, Blake, and Yang.
Maybe it's the 'overlord' concept. Most RWBY fanfics might focus on the regular storylines within the RWBY world, like the battles against Grimm and the development of the four main characters. But 'A new overlord RWBY fanfic' could introduce a new power structure or a different kind of antagonist based on the 'overlord' idea, which would set it apart from others.
It might be that this fanfic focuses on a knight who has to face new and unexpected foes in the RWBY setting. It could explore how the knight's combat skills and strategies are put to the test against these new adversaries. It could also involve the knight interacting with the well - known RWBY characters and forming alliances or rivalries.
One great RWBY Fallout New Vegas fanfic is 'Desert Rose' which combines the unique settings of both universes really well. It has interesting character interactions and a captivating plot that keeps you hooked from the start.
Create a plot that involves a mystery. Maybe there's a series of disappearances at Beacon Academy, and the characters have to solve it. Along the way, they discover secrets about the academy and its founders. This keeps the readers guessing and engaged.
A plot could revolve around a new tournament in the RWBY universe specifically for the new game. Characters from different academies form teams not only to compete but also to uncover a conspiracy that seems to be using the tournament as a cover. It would involve a lot of intense battles, strategic planning, and some mystery-solving.