One idea could be a crossover where the characters from RWBY and Samurai Jack team up to fight a common enemy. Maybe a powerful Grimm has somehow made its way into Jack's world, and he needs the help of Ruby and her team to defeat it.
A more complex idea would be to create a fanfic where the time - traveling aspect of Samurai Jack's story is intertwined with RWBY's lore. Perhaps there's a time - related relic in RWBY that Jack is drawn to, and in the process, he gets involved in the ongoing battles and political intrigue in Remnant.
One interesting crossover could be the unique fighting styles. Samurai Jack's precise and traditional swordsmanship could be combined with RWBY characters' more acrobatic and Dust - enhanced combat. For example, Ruby's scythe - wielding speed might be paired with Jack's strategic strikes.
One plot idea could be Jack and Ashi exploring a new, uncharted land together. They face strange creatures and have to use their combined skills to survive. Another could be a story where they go back in time to prevent a certain event that would have a huge impact on their future. And a third idea is that they have to protect a magical artifact from an evil force, with their relationship growing stronger throughout the adventure.
One idea could be creating an OC who is a long - lost relative of Samurai Jack. Maybe a cousin who has also been trained in the ways of the samurai and comes to help Jack in his fight against Aku. This OC could have unique abilities, like the power to control the elements, which would add new and exciting elements to the story.
Often, Tumblr also has fanfic communities where people might share or recommend RWBY Samurai Jack crossovers. You can search relevant tags and see if any users have posted links or reviews of good fanfics in this genre.
There could be a plot where the ninjas in the Naruto world are being influenced by Aku's dark magic. Samurai Jack, with his unwavering sense of justice, teams up with Naruto and his friends to break the spell. They then travel to Aku's lair to take on Aku directly. Another interesting idea is a world where the Naruto characters are re - imagined as samurai, and Jack has to train them in the ways of the samurai to face a new threat that combines the worst of both their worlds.
Well, a plot could revolve around Aku trying to keep his pregnancy a secret from Samurai Jack. He might be worried that Jack would use this new situation to his advantage. And then there could be a sub - plot about Aku having strange cravings that lead him to unexpected places in the world of the fanfiction, causing chaos in different ways.
One interesting RWBY Samurai fanfiction could be about a samurai - inspired character joining Team RWBY on their adventures. This would add a new dynamic to the group, with the samurai's code of honor influencing the team's decisions.
One idea could be a fanfic that explores the backstories of minor characters in RWBY more deeply. For example, you could focus on a character like Velvet and create a story about her training before coming to Beacon. Another could be a crossover within the RWBY universe itself, like a team-up between different schools' teams that we haven't seen much of in the official series.
Perhaps a story where Jack discovers a hidden power within himself that has a connection to Cybertronian technology. This power could make him a key figure in a conflict between the Autobots and Decepticons. He might have to learn to control it with the help of his Cybertronian friends.
One idea could be a samurai who is transported to a modern world and has to adapt to new technologies while still holding onto his samurai values. Another could be a story about a female samurai in a male - dominated world, facing discrimination but proving herself as a great warrior. Or perhaps a samurai who forms an unlikely alliance with a group of bandits to fight a common enemy.