Well, it follows the story by being set in the same universe. It features similar themes like the fight between the Rebellion and the Empire. It also has elements such as the Force, lightsabers, and iconic starships that are all part of the broader Star Wars story.
One great Star Wars Rebels Rex fanfiction is 'Rex's Redemption'. It shows Rex finding his place in the Rebellion after his Clone Wars experiences. Another is 'Rex and Ezra's Bond', which focuses on the relationship between Rex and Ezra Bridger. There's also 'Rex's Leadership in the Rebels' that details how Rex uses his military knowledge to help the Rebels.
One way is through flashbacks. Maybe Kanan or Hera have heard stories from older Jedi about Yoda. These stories could then be shown in flashbacks and influence their actions in the present. Also, Yoda's teachings could be passed down through Jedi texts that the Rebels find. This would be a more indirect but still realistic way of incorporating him into the story. And his connection to the Force could be felt by Force - sensitive Rebels in times of great need, guiding them without actually appearing physically.
Sabezra fanfiction adds a lot to the fandom. It allows fans to explore the relationship between Sabine and Ezra in ways that the show might not have fully. For example, it can give more in - depth looks at their feelings for each other.
One interesting concept is exploring the backstories of minor characters. For example, in some fanfictions, they might delve into the past of a random stormtrooper, showing how they ended up in the Empire. Another concept could be alternate endings to major events in the series. It gives fans a chance to rewrite parts they thought could have been better.
In Star Wars Rebels, a popular storyline is the crew of the Ghost fighting against the Empire. In fanfiction, there are many where a new character joins the Rebellion. For example, some fics focus on a young Force - sensitive individual finding their place among the rebels.
Fanfiction expands on Star Wars Rebels by exploring unshown relationships. For instance, between minor characters. It can also delve deeper into the backstories of the main characters.
There are several great plot ideas. For instance, imagine a situation where Yoda, before his death, set in motion a series of events that are only starting to unfold during the Rebels' time. Maybe he planted the seeds for a new Jedi order in a very secretive way. A young Rebel might stumble upon these secrets. Another idea is that Yoda's teachings, which were thought to be lost, are rediscovered by the Rebels through an ancient Jedi artifact. This discovery changes the way they approach the fight against the Empire. And what about a story where Yoda's influence reaches out to a non - Force - sensitive character in Rebels, inspiring them to do great things for the Rebellion in a different way?
One similar fanfic could be 'Endless Struggles in the Rebellion'. It also focuses on the hardships that the Star Wars Rebels characters face. Another might be 'Troubled Times for the Ghost Crew' which, like the one you mentioned, likely has the crew dealing with one problem after another. There's also 'Perils of the Rebellion' which would probably have a similar theme of the rebels constantly facing difficulties.