Maybe a story where a character from RWBY discovers a lost Transformer in the wilderness. This Transformer could be damaged and in need of repair. The RWBY character, with their unique skills, tries to help the Transformer while also learning about its origin and the greater universe it comes from. This could lead to a deep friendship and an exchange of knowledge between the two different worlds.
One idea could be a crossover where the Autobots from Transformers Prime end up in the world of RWBY. They could team up with the RWBY characters to fight a common enemy, like a new type of Grimm that has some technological abilities similar to the Decepticons. The Autobots' advanced weaponry and technology would be a great addition to the RWBY universe's combat.
One idea could be exploring Predaking's origin in more depth. Maybe he has memories from before his creation that he slowly uncovers. Another could be a story where Predaking tries to form an alliance with the Autobots against a common enemy, like a new and powerful Decepticon threat.
One idea could be a human character who discovers a hidden power within themselves that can interact with the Cybertronian technology in unique ways. For example, they might be able to heal damaged Transformers using a special energy they possess.
One idea could be a story where Optimus Prime has to team up with an unlikely ally from another planet. Maybe a small, scrappy alien that has some unique abilities that can help in the fight against the Decepticons. This would add an interesting dynamic as Optimus has to learn to work with a very different being.
Maybe the Transformers end up in Remnant due to a space - time rift. The Grimm might be attracted to the Energon that the Transformers carry. The RWBY teams would have to team up with the Transformers to fight off both the Grimm and the Decepticons if they also show up. Yang could learn some combat moves from the Autobots, which would add a new dimension to her brawler style.
A lot of RWBY Transformers Prime fanfictions explore the idea of the Transformers being in Remnant. In some, they are seen as gods by the people of Remnant at first. This creates interesting dynamics as the RWBY characters have to figure out if they can trust these new, powerful beings. These fanfictions often delve into themes of trust, power, and friendship.
A plot idea could be that Optimus Prime time - travels. He goes back to the beginning of the war between the Autobots and the Decepticons and tries to prevent it from starting. Along the way, he meets younger versions of his friends and enemies and has to deal with the consequences of changing the past. Or perhaps, Optimus is trapped in a dimension where the laws of physics are different. He has to adapt quickly and find a way back to his own world while also facing off against new threats.
A Vehicon OC fanfiction could focus on their transformation into a more independent being. They might discover a hidden power within themselves that sets them apart from the other Vehicons. This new power could lead them on a journey of self - discovery and ultimately a change in their allegiance.
One idea could be to write about how the other Autobots react to Jack being hurt. For example, Arcee might become extremely protective and vow to find whoever or whatever caused the harm. She could go on a solo mission to seek revenge while the other Autobots try to keep Jack stable and safe at their base.
A plot could involve Bumblebee getting damaged and losing his memory. The RWBY characters find him and try to repair him while also helping him regain his memories. As they do this, they learn about the Transformers universe and Bumblebee starts to adapt to the RWBY world, eventually using his unique abilities to help them in a big battle against a powerful Grimm horde and a new villain that has emerged.
One idea could be that Optimus Prime travels back in time to prevent the creation of a powerful Decepticon weapon. This would change the whole course of the war. Another could be a human character traveling to the future of the Transformers' world to see how the conflict ends and bring back knowledge to change the present situation. And perhaps a Decepticon time - travels to the past to rewrite history and make themselves the rulers from the very beginning.