One idea could be a crossover where the characters from Metal Gear Rising have to adapt to the world of RWBY. For example, Raiden could team up with Ruby and they could share their combat skills. Maybe Raiden teaches Ruby some advanced sword techniques, while Ruby shows Raiden how to use Dust in combat.
Another plot could involve a common enemy that threatens both universes. The villains from Metal Gear Rising, like Desperado Enforcement, could form an alliance with some of the Grimm-creating forces in RWBY. The heroes from both worlds then have to put aside their differences and work together to stop this new threat. They might struggle to understand each other's cultures and fighting styles at first, but gradually learn to cooperate effectively.
A plot idea could also be centered around a character from Metal Gear Rising getting lost in the RWBY world. Let's say Blade Wolf ends up in Remnant. He could befriend some of the RWBY characters, like Weiss. Weiss could be intrigued by Blade Wolf's technology and intelligence. Together, they could try to find a way for Blade Wolf to get back to his own world, while also getting involved in some local conflicts against the Grimm.
One idea could be a crossover where the characters from RWBY have to adapt to the high - tech, cybernetic world of Metal Gear Rising. For example, Ruby could be fascinated by the advanced weaponry and try to incorporate some of the technology into her Crescent Rose. Another idea is a story where the villains from Metal Gear Rising are somehow transported to the RWBY universe and cause chaos, forcing the RWBY teams to team up with the heroes from Metal Gear Rising to stop them. A third idea might be a character - study type of fanfiction, focusing on how a character like Raiden would react if he found himself in the RWBY world with its unique magic and Grimm threats.
Perhaps the fanfic explores how the technology from Metal Gear might be incorporated into the RWBY universe. It could be about creating new weapons or gadgets for the RWBY characters using the advanced tech concepts from Metal Gear. This might change the power dynamics and the way battles are fought in the RWBY world.
Raiden and Ruby would be an interesting pairing. Raiden is a highly skilled cyborg ninja with his own set of morals and combat abilities. Ruby, on the other hand, is a young and determined huntress. Their interaction could be fascinating as they come from different worlds but share a passion for fighting for what's right. Raiden's experience could help Ruby grow, and Ruby's enthusiasm could inspire Raiden.
One idea could be an OC who is a master of stealth technology, perhaps even surpassing Snake in some ways. They could be on a mission to uncover a new type of Metal Gear that has been secretly developed by a rogue faction within the military - industrial complex. Another plot could involve an OC who has a unique connection to the AI systems in the Metal Gear universe, and they have to prevent the AI from going rogue and causing global chaos.
In a fanfic about Mistral, her cultural background could be an interesting aspect. Given the nature of the Metal Gear Rising universe, her cultural roots might influence her values and actions. Additionally, her internal struggles could be a great topic. Does she have any moral dilemmas? How does she deal with the violence and chaos around her? And of course, her future in the game's universe. What are her goals and aspirations? How will she achieve them? These are all things that can make a fanfic about her really engaging.
One interesting concept could be the fusion of the unique fighting styles from RWBY and the stealth elements of Metal Gear. For example, characters from RWBY might incorporate Metal Gear's sneaking techniques into their battles in the fanfiction.
One idea could be exploring the backstory of a minor character. For example, the life of a random guard in one of the bases. What led them to work there? Do they have a family? Another could be a what - if scenario, like what if Snake had made different choices during a crucial mission. It could completely change the course of the story.
Perhaps there could be a story where some of the Metal Gear Rising characters are reincarnated as ninjas in the Naruto world. They retain their memories and abilities from their previous lives. Raiden, for instance, could be reborn as a member of a minor ninja clan. He would then rise through the ranks, using his unique skills and determination, and eventually play a major role in the events that shape the Naruto world, all while trying to figure out why he was reincarnated in this strange new place.
Sure. One popular Metal Gear Rising fanfiction is 'The Ascent of Raiden'. It delves deeper into Raiden's post - game development, exploring his new abilities and how he copes with the aftermath of the main story events. Another one is 'Cybernetic Vengeance' which focuses on Raiden taking on a new, more powerful enemy that was not in the original game. There's also 'Rising Shadows' that gives more backstory to some of the minor characters in the Metal Gear Rising universe.
Perhaps a story where some of the Metal Gear technology finds its way into the Naruto world. Orochimaru might be interested in getting his hands on such advanced tech for his experiments. He could try to reverse - engineer it to enhance his own abilities or create new, powerful jutsu. And Konoha would have to deal with the threat of this new, unknown technology while also facing their regular enemies.