A great fanfiction idea could revolve around a time - travel plot. For example, some of the Transformers from 'Robots in Disguise' are sent back in time to the early days of the Cybertronian war. They have to use their modern knowledge and skills to change the course of history without disrupting the timeline too much. This would involve lots of action scenes as they fight against the primitive Decepticons and try to influence key events.
First, know the characters well. Study their personalities, abilities, and relationships in the original series. For example, Bumblebee is known for his bravery and loyalty, so keep that in mind when writing him. Then, come up with an original plot. It could be something like a new mystery on Earth that only the Autobots can solve. Don't be afraid to add your own twists.
One common theme is friendship. Raf's relationship with the Transformers, how they bond and support each other through different challenges. Another is adventure. Raf often gets involved in the Autobots' missions, so there are lots of stories about their exciting adventures together.
One idea could be an OC (Original Character) who is a new Autobot arriving on Earth. They have a unique ability, like being able to communicate with animals. This could lead to some interesting adventures as they help the other Autobots in ways the others can't. For example, they might get help from a flock of birds to spy on Decepticons.
First, think about their appearance. It could be a unique color scheme or a different body type compared to the regular Autobots or Decepticons. For example, your OC could have wings even if they are an Autobot ground vehicle. Then, consider their personality. Maybe they're really shy but super brave in battle. This contrast can make them interesting.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fanfictions on various topics, including Transformers Robots in Disguise and Raf - related stories. Just use the search function and type in relevant keywords to find the ones you might like.
The Combiner Wars story mainly focuses on the battles and rivalries among combiners. Combiners are groups of smaller robots that can merge to form a larger, more powerful robot. In this story, different factions of combiners compete for resources, territory, and power. There are various heroic combiners trying to protect their allies and the universe from the evil combiners' malicious intents.
In the Combiner Wars story, the main characters include the combiners themselves. There are combiners like Superion, who is made up of several Aerialbots. These individual Aerialbots have their own identities and play important roles within the combiner. Another main character could be Menasor, a powerful and often villainous combiner. The pilots or operators of these combiners, if there are any in the story, can also be considered main characters as they influence the combiners' actions.
I'm not sure as I haven't read the specific 'the man in disguise novel'. It could be the protagonist who has some secret mission or is trying to hide his true identity for various reasons like escaping from enemies or uncovering a mystery.
It could be a way to drive the plot forward. For example, his disguise allows him to access places or information that he otherwise wouldn't be able to. This then leads to a series of events that form the core of the story. Say he disguises as a servant in a wealthy household. Through this, he overhears important conversations among the family members or discovers some dark secrets of the house, which then propels the story into different directions.