Another interesting plot could be a tournament where teams from both RWBY and Battle Force 5 compete. But as the tournament progresses, they start to realize that there is a hidden conspiracy behind it, and they must work together to expose the truth and stop those behind it.
One idea could be an OC who discovers they have a unique connection to the Speed Force that allows them to time - travel in a different way than the Flash. For example, they can visit alternate timelines related to speedsters. Another idea is an OC using the Speed Force to create speed - based constructs, like swords or shields. It would add a new dimension to their powers in combat.
Ruby would be a likely candidate. She's already known for her speed and agility in combat. If she were to be affected by the Speed Force, it would enhance her existing abilities to a whole new level. She could move so fast that she becomes almost invisible to her enemies, and her scythe attacks would be even more deadly with the added momentum.
A plot idea could be that a portal opens between the My Hero Academia world and the DC universe where the Speed Force exists. A hero from MHA gets sucked into the DC world and has to learn to control the Speed Force to get back. Along the way, they meet DC characters and learn new ways to use their speed - based powers.
One idea could be exploring an alternate universe where the Battle Force 5 team has different powers or vehicles. For example, instead of their regular rides, they could have flying saucers with unique offensive capabilities.
A possible plot for Danger Force fanfiction is that there is a power outage in Swellview that affects all the high - tech gadgets and powers of the Danger Force. They have to rely on their wits and basic physical skills to fight off a group of villains who take advantage of the situation. Another idea is that a mysterious force starts to make all the supervillains in Swellview team up. The Danger Force has to figure out what is causing this alliance and break it up before the villains launch a major attack on the city. And for a more character - focused plot, one of the Danger Force members starts to doubt their place on the team after making a big mistake during a mission. The rest of the team has to help them regain their confidence and prove that everyone makes mistakes and they are still an important part of the team.
One idea could be a story where the heroes from different Jump universes have to team up against a new, unknown threat that is slowly corrupting their worlds. Another could be a character - driven story focusing on a minor character from one of the Jump series and their journey through the chaotic world of Jump Force.
One idea could be a new student arriving at the school with a mysterious power that no one has seen before. This could cause both excitement and suspicion among the other students.
One idea could be a mercenary who is hired by a mysterious client to steal an ancient relic from Beacon Academy. He has to navigate through the various defenses and teams of Huntsmen and Huntresses.
A plot could involve an esports competition where teams from different kingdoms in the RWBY universe compete. The story could explore how the RWBY team overcomes rivalries and strategic differences. They might also have to deal with a mysterious hacker trying to disrupt the tournament.