One interesting concept could be the mixing of different species from the Star Wars universe with elements from an empire (could be another fictional empire). For example, imagining stormtroopers interacting with Ewoks in a new and unexpected way, like Ewoks using their primitive technology to outwit stormtroopers in a combined universe scenario.
One interesting concept could be the introduction of characters from other universes into the Galactic Empire's power structure. For example, a character with unique magical abilities might disrupt the Empire's order. It could also be about how the technology of the Galactic Empire interacts with different fictional technologies in the crossover.
One interesting concept could be the interaction between the Federation in Star Trek and the Galactic Republic in Star Wars. For example, how would their different forms of government and ideologies clash or cooperate? Another concept might be the use of technology. Star Trek has the transporter and Star Wars has the hyperdrive. How would characters from each universe react to the other's technology? Also, the idea of Jedi and Vulcans interacting due to their shared emphasis on mental discipline is really cool.
Well, a cool concept in this crossover fanfiction could be the political intrigue. In Star Wars, there's a lot of political maneuvering. In a crossover, we could see how the Voltron universe, which also has its own political structures within the various planets and species, would interact with the complex political landscape of Star Wars. The Galactic Senate could have some interesting reactions to the arrival of Voltron and its crew, and vice versa.
One interesting concept could be Superman's powers in the Star Wars universe. How would his super strength, flight, and heat vision interact with the Force and lightsabers? Another concept might be the moral alignment. Superman is known for his strong moral code, and seeing how that would mesh with the complex moralities in Star Wars, like the Jedi Code, would be fascinating.
One interesting concept is the mixing of the weaponry. Imagine a lightsaber - like weapon in the Borderlands universe or a Borderlands - style gun in Star Wars. Another is the character interactions. For instance, how would a Jedi interact with a Vault Hunter? It could be really cool.
One interesting concept could be the Spartans from Halo interacting with the Jedi in Star Wars. Imagine a Spartan being trained in the ways of the Force. Another concept might be the Covenant technology being used in the Star Wars universe, like their energy weapons in the hands of the Sith or the Rebels. And also, the Flood from Halo could be a terrifying new threat in the Star Wars galaxy.
One interesting concept could be the interaction between different species from the Star Wars universe and the CIS (Confederacy of Independent Systems). For example, how would a Twi'lek diplomat negotiate with the CIS leadership? Another concept might be the technological exchange. Maybe a young inventor from a neutral planet tries to combine the advanced droids of the CIS with the unique Force - related technology in the Star Wars galaxy. Also, the moral and ethical dilemmas that characters face when dealing with the CIS's separatist ideology can make for really engaging fanfiction.
In Naruto Star Wars crossover fanfiction, an exciting concept is the idea of jutsu being used in place of some Star Wars technology. For instance, teleportation jutsu instead of hyperdrive for faster travel. Also, the idea of different Naruto clans being like different species in the Star Wars universe. The Uchiha could be like a powerful, secretive group similar to the Sith, but with their own code of honor based on their Naruto background.
One interesting concept could be the power levels. In DBZ, characters have extremely high power levels through ki. In Star Wars, the Force is a different kind of power. A crossover could explore how these two power systems interact. For example, a Saiyan using the Force or a Jedi using ki techniques.
One interesting concept could be a character from Star Wars, like Luke Skywalker, finding himself in the world of Aladdin. He might use the Force in ways that seem like magic to the people of Agrabah. For example, he could levitate objects, which would be similar to Aladdin's magic carpet. Another concept could be Darth Vader arriving in Agrabah and causing chaos. His dark presence would be a huge contrast to the usually colorful and lively world. It could lead to a great story of good vs. evil where Aladdin and his friends have to use their wits and unique abilities to combat Vader.