Perhaps in this crossover, a Star Wars character like Luke Skywalker discovers a strange artifact that has the power of the Light from Destiny. This leads him on a journey to find out more about it, and he meets up with Destiny characters along the way. They then combine their knowledge of the Force and the Light to battle an emerging evil that has elements of both the Star Wars dark side and the Darkness in Destiny.
One idea could be a group of Guardians from Destiny being transported to the Star Wars universe. They could team up with the Jedi to fight against the Sith and the Darkness that threatens both universes. Maybe they would introduce their advanced weaponry and abilities to the Star Wars characters.
Another plot could involve the Empire in Star Wars getting their hands on some Destiny tech. They try to reverse - engineer it for their own gain, but it starts to cause chaos as the technology doesn't mesh well with the Star Wars universe. A group of rebels, along with Destiny Guardians, have to stop the Empire from causing a catastrophic event with this misused tech.
One idea could be having the Guardians from Destiny team up with the Jedi in Star Wars. The Guardians' unique abilities with their Light powers could interact in interesting ways with the Force used by the Jedi. Maybe they could face a common enemy that threatens both their universes, like a powerful Sith who has somehow gained access to the Darkness from Destiny.
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.
Well, a really cool plot could be that the Frozen world is actually a long - lost planet in the Star Wars galaxy. The characters from Frozen get involved in the Galactic Civil War. Maybe Kristoff, who is used to cold environments, helps the Rebel Alliance on an ice - covered planet. Elsa could also use her ice powers to create defenses against the Empire's attacks, like building ice walls around Rebel bases. And Anna could befriend some of the alien species in the Star Wars universe and convince them to join the fight against the Empire.
One idea could be a crossover with the original Star Wars trilogy characters. For example, having Luke Skywalker meet the Rebels crew and learn from their guerilla warfare tactics against the Empire. It would be exciting to see how their different fighting styles blend and how they interact with each other.
One plot idea could be Superman being transported to the Star Wars universe. He might use his powers to help the Rebel Alliance. For example, his super strength could be used to move large objects during battles or his heat vision to take out enemy ships. Another idea is that he teams up with Jedi. He could learn about the Force and they could combine their powers to fight the Sith.
One idea could be Jedi coming to Earth to train a select group of humans with Force - like abilities. Another could be a Sith Lord arriving on Earth and causing chaos, and Earth's heroes have to team up with Star Wars characters to stop him. Maybe there's a discovery of a hidden Star Wars - related artifact on Earth that has the power to change the balance of the Force.
One idea could be that the Spartans from Halo are sent through a wormhole and end up in the Star Wars galaxy. They could then get involved in the Clone Wars, with their advanced technology and combat skills being a huge asset or a source of great confusion among the different factions. Maybe they team up with the Jedi at first, but then some misunderstandings occur due to their different ways of handling situations.
One plot idea could be Thrawn crossing over into an alternate Star Wars timeline where the Jedi Order never fell. He could find himself in a situation where he has to adapt to a galaxy full of powerful Jedi. Another idea is a crossover with a different sci - fi universe, like Star Trek. Thrawn might use his tactical genius to face off against the Federation. Or perhaps a crossover with a post - apocalyptic Star Wars setting, where Thrawn has to lead a group of survivors against new threats.
A great plot could be that Master Chief somehow gets transported to the Star Wars universe. He could find himself in the middle of a battle between the Sith and the Jedi. His combat skills and advanced armor would be a huge asset to either side. Or perhaps there could be a story where the Forerunners have some ancient connection to the Force in the Star Wars galaxy. This could lead to a search for lost Forerunner technology that could change the balance of power in the Star Wars universe.
Perhaps in a Star Wars Twilight crossover fanfiction, the Force could be seen as a kind of super - power in the Twilight universe. A Jedi could come to train the Twilight characters in how to use this 'new' power. They would have to adapt their Jedi teachings to fit the different nature of the Twilight world, which has its own set of rules regarding vampires and werewolves.