There could be a story where a female rock fan is a huge fan of Ben 10 and she dreams of meeting him. One day, she gets a backstage pass to a concert where Ben 10 is also present (in disguise). They start talking about music and she shows him some of her original rock compositions. Ben 10 realizes that the lyrics of her songs hold clues to an upcoming alien invasion. So, they join forces. The female fan uses her music to inspire Ben 10 during battles, and together they defeat the aliens who were planning to use earth's music to power their evil machines.
One plot idea could be a female rock fan who discovers that Ben 10 has a secret love for rock music too. They meet at a concert and team up to save the day when an alien threat targets the concert venue. Another could be a female rock star who gets her Omnitrix - like powers and teams up with Ben 10 to battle music - hating aliens. A third idea is that a female rock fan is transported into the Ben 10 universe and uses her knowledge of rock music to communicate with some alien species that are attracted to the energy of rock music.
One plot idea could be Female Albedo trying to fit into human society while hiding her true identity. She could struggle with normal human things like school or making friends, all while having to keep her alien powers a secret. Another idea is that she teams up with Ben 10 to fight a new common enemy. They initially don't trust each other but as they face challenges, they learn to work together.
One idea could be a crossover where the Miraculous heroes and Ben 10 team up to fight a common enemy. Maybe an alien villain that is immune to the powers of the Miraculous but Ben's alien forms can counter. Another could be a situation where Ladybug's Lucky Charm combines with one of Ben's alien gadgets to create a super - weapon. And a third could be a story where Ben gets akumatized and the Miraculous heroes have to figure out how to save him without using brute force as his alien forms are very powerful.
One idea could be that the characters from RWBY and Ben 10 universes team up to fight a common enemy that threatens both their worlds. For example, a powerful alien race in the Ben 10 world that has somehow found a way to access Remnant (the RWBY world) and is causing chaos.
One idea could be that Ben uses his Omnitrix to transform into a Pokemon - like form. For example, he could turn into a fire - type alien that has the abilities of a Charizard. Another plot could involve Ben and Ash Ketchum teaming up to stop a powerful villain who is trying to capture all the Pokemon and use the Omnitrix for evil purposes. Maybe there's a device that can fuse Pokemon with Ben's aliens, creating super - powerful hybrids.
Maybe in the fanfiction, Attea is in trouble on her home planet and Ben, being the hero he is, goes to help her. Along the way, they discover a long - lost secret about their two species that changes their relationship forever. This could involve some cool battles and new alien forms for Ben to use.
Perhaps a story where an old enemy of Ben's targets Rook to get to Ben. Ben feels guilty and protective. They go on the run, hiding in different places across the galaxy. Along the way, they meet some interesting characters who help them. In the end, they face the enemy together, with Ben using his Omnitrix and Rook using his upgraded Proto - Tool to defeat the bad guy.
A plot could revolve around them having a child. Rock would be the more nurturing one, while Revy would be overprotective. They could have different views on how to raise the child, like Rock wanting a more peaceful upbringing and Revy wanting to teach the child self - defense from a young age. It would lead to some interesting family dynamics and character growth for both of them.
A fanfiction plot could be about a new threat that is specifically targeting the Omnitrix and the Power Rangers' power source. Ben and the Rangers have to figure out how the enemy is doing this and stop them. Along the way, they discover a hidden connection between the two power systems that was unknown before. There could be some character development for both Ben and the Rangers as they struggle to protect what they hold dear.
One idea could be that an alien vampire infiltrates Ben's team. It pretends to be a friendly alien at first but then starts to slowly drain the energy of the other aliens. Ben has to figure out a way to expose it without endangering his friends.
One plot idea could be that Gwen and Lemon have to team up to rescue Ben from an otherworldly threat. They start off not getting along well due to their different personalities, but as they face various challenges during the rescue mission, they learn to understand and respect each other. Another idea is a time - travel story where they go back in time and accidentally change something in Ben's past, and then have to figure out how to fix it before it causes major disruptions in the present. A third plot could be that a new villain targets Gwen and Lemon specifically because of their connection to Ben, and they have to use their combined powers and wits to defeat the villain.