Maybe an OC with the ability to communicate with animals. The Incredibles are on a mission in a jungle and the OC uses their power to enlist the help of the local wildlife to defeat the bad guys. This could add a new and fun dynamic to the story.
One idea could be an OC who has the power to manipulate time. They could accidentally get stuck in a time loop during a mission with the Incredibles and have to figure out how to break free while also helping the family stop the villain.
One idea could be an OC with the power to manipulate time joining the Incredibles. They could use their power to prevent disasters or even go back in time to change events that led to Syndrome's rise. Another idea is an OC who is a super - fast healer. They could play a crucial role in patching up the Incredibles after tough battles.
A really cool idea for a 'the incredibles fanfic' would be to have the Incredibles travel to a different dimension. In this new dimension, the rules of superpowers are different, and they have to adapt quickly. They could meet alternate versions of themselves or new allies and enemies. This would open up a whole new world of possibilities for the story.
One idea could be that Buddy Pine, after his defeat, has a change of heart and tries to redeem himself by secretly helping the Incredibles in their new missions. He could use his tech - savvy skills to give them an edge against new villains.
One idea could be that the Incredibles' superpowers are enhanced by the Avengers' technology. For example, Mr. Incredible could get a high - tech suit from Stark Industries that gives him even more strength and the ability to fly short distances. Another plot could involve the villains from both universes teaming up, forcing the combined heroes to work together in new ways. Maybe Syndrome teams up with Loki, and they create a device that can nullify superpowers, so the heroes have to find a way to stop it.
A mystery - themed 'the oc fanfic' would also be great. Maybe there's a mystery surrounding the Cohen family's wealth or a long - lost relative that suddenly shows up with a hidden agenda. The characters would have to work together to solve the mystery, and in the process, their relationships would be tested and new alliances formed.
One idea could be exploring an OC's (Original Character) journey to become a leader within the 100's post - apocalyptic world. They could start as an outcast and through their unique skills, like advanced medical knowledge or exceptional hunting abilities, gain the respect of different factions.
A possible plot for 'rwby the incredibles fanfiction' is that Syndrome from The Incredibles teams up with Salem from RWBY. Syndrome offers his advanced technology to Salem in exchange for her help in getting revenge on the superhero community. The RWBY characters and the remaining Incredibles then have to find a way to stop this unholy alliance. They might start by training together to combine their different skills. Ruby could teach Dash some new acrobatic moves, and Elastigirl could show Blake how to use her flexibility in combat more effectively.
One idea could be Elastigirl having to deal with a new supervillain who has the ability to manipulate time. She would have to stretch her powers in new ways to overcome the time - warping challenges. For example, she might have to stretch across different time zones simultaneously to stop the villain from creating chaos throughout history.
A really cool plot could be that Frozone and Batman meet and decide to have a friendly competition of who can be the most stealthy in a series of challenges across both their cities. However, they soon realize that a new villain is using their distraction to carry out a big heist. So they have to put their differences aside and work together. Another idea is that Violet and Robin become friends and exchange tips on how to be better heroes. Then they use their combined skills to stop a villain who is targeting young heroes in both universes.
An OC could be a street artist in Ikebukuro who uses their art to tell the stories of the various gangs and groups in the area. This OC could interact with Celty as they both have an interest in the unique aspects of the city. They might start a project to document Celty's presence in a positive way, which could draw the attention of the Dollars and other factions.