One idea could be that the Skeksis from 'The Dark Crystal' discover the power of the Force in the 'Star Wars' universe. They might try to capture Jedi to learn their secrets and use the Force for their own dark purposes, like extending their lives even further.
Imagine if a Sith Lord got hold of a shard of the Dark Crystal. He could try to corrupt it with the dark side of the Force, creating a new kind of dark power source. This could draw the attention of both the Jedi and the Skeksis, who would either want to destroy it or claim it for themselves. The fanfiction could then follow the battles and power struggles that ensue.
Perhaps a group of Gelflings end up on a Star Wars planet. They form an alliance with the Rebels. The Gelflings' unique abilities, like their connection to nature in 'The Dark Crystal', could be used to help the Rebels in their fight against the Empire. For example, they could use their skills to navigate through difficult terrains on a forest - covered planet that the Empire is trying to control.
In a fanfiction, Ezra could be exposed to a dark side cult. They convince him that the Dark Side offers a more efficient way to bring order to the galaxy. He then starts to use dark side techniques in his fighting and decision - making. His fall to the Dark Side could be a long and tragic process, with him losing his moral compass along the way.
Ahsoka might be exiled from the Jedi Order for reasons she doesn't fully understand. In her solitude, she meets a mysterious figure who has ties to the Dark Side. This figure begins to teach her alternative ways of using the Force that are more in line with the Dark Side. Ahsoka, feeling betrayed by the Jedi, starts to consider these new teachings.
Well, perhaps Naruto is found on a strange planet in the Star Wars galaxy. He then gets involved in the fight between the Sith and the Jedi. With his determination and never - give - up attitude, he could inspire some of the young Jedi trainees. His ability to make friends easily might also lead to some unexpected alliances, like getting the Hutts on the side of the good guys for once.
Imagine a scene where a Gelfling meets a young Padawan. The Gelfling could show the Padawan their connection to nature and their own kind of magic, which might be different from the Force but still inspiring. On the other hand, if a Skeksis were to encounter a Sith Lord, there would be a power struggle for sure. Both are power - hungry and would likely try to outwit the other to gain more control over whatever they desire.
A Dark Crystal and Star Wars crossover fanfiction could be really interesting. Maybe the unique creatures from The Dark Crystal could be found in a far - flung Star Wars planet. For example, the Skeksis could be some sort of dark force - using villains in the Star Wars universe. The Gelflings might be like a new species that the Jedi or the Sith take an interest in.
In one idea for a fanfiction, the Empire creates a false prophecy that convinces Ezra that he is meant to rule the galaxy as a Dark Lord. They manipulate events and his emotions to make him believe that the Dark Side is his true path. He then starts to build his own army of Dark Side followers. But as he rises in power, he realizes that he has been deceived, yet by then it may be too late to easily return to the Light Side.
One idea could be exploring the backstory of a new, powerful Sith Lord in the Dark Destiny universe. Maybe this Sith Lord was once a Jedi apprentice who fell to the dark side due to a great betrayal. Another could be focusing on a group of rebels trying to find a long - lost Jedi holocron that holds the key to defeating the dark side once and for all in this fanfiction setting. A third idea might be a story about a young Force - sensitive character who is caught between the light and dark side, being courted by both the Jedi and the Sith.
One idea could be exploring the life of a new Jedi who emerges during the Dark Empire era. They could start as a hidden Force - sensitive on a remote planet and then get drawn into the conflict between the remnants of the Empire and the New Republic. Another plot could focus on the dark side artifacts that are being unearthed during this time and how different factions are trying to control them. Or perhaps a story about a group of smugglers who accidentally get caught in the middle of the power struggle between the Empire and the Republic and have to use their wits to survive.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including ones that combine 'The Dark Crystal' and 'Star Wars'. Another option is FanFiction.net. Just search for the relevant tags like 'Dark Crystal' and 'Star Wars' on these platforms.
One possible plot could be a group of rebels being faced with a firing squad by the Empire. Maybe a young Jedi in hiding among them uses the Force to turn the situation around, causing the stormtroopers' blasters to malfunction at the last moment and then leading the rebels to fight back and escape.