One way to combine them creatively is to have a Disney princess end up in the Star Wars universe. For example, Belle could be a diplomat on a planet in the Star Wars galaxy, using her intelligence to negotiate treaties. Another idea is to give a Star Wars character the traits of a Disney princess. Maybe Rey could be seen as a kind of 'princess' figure, with her own 'castle' (the Millennium Falcon) and her loyal 'subjects' (her friends).
Well, you could create a fanfiction where a Disney princess has Force powers. Like Cinderella, who could use the Force to make her chores easier and then discovers she has a greater destiny in the Star Wars galaxy. Or, take a Star Wars villain and make them interact with a Disney princess. Darth Vader could be sent to a Disney - like world where he meets Snow White and is somehow changed by her purity and kindness.
In terms of storylines, a fanfiction could focus on a mission where Naruto and his friends are transported to the Star Wars galaxy during the Clone Wars. They might team up with Jedi and clones to fight against the Separatists. Naruto could learn about the Jedi way and share his ninja philosophy. This would create an interesting dynamic as the two different cultures of ninjas and Jedi interact.
One way to combine them is by having a crossover where a US Army soldier somehow gets transported to the Star Wars universe. Maybe through a strange portal or experimental technology. He could then use his military training in the new and dangerous environment of Star Wars, like in combat against the Sith or in strategic planning with the Rebel Alliance.
One way to combine them creatively could be to have a Naruto - like character in the Star Wars universe who becomes a senator. For example, a ninja - skilled character from Naruto's world finds themselves in the Galactic Senate. They could use their unique abilities like stealth and combat skills to deal with political intrigue and threats within the Senate, much like how senators in Star Wars face various challenges.
One way to combine them creatively could be to have a character with Sharingan-like abilities in the Star Wars universe. For example, a Jedi or Sith might develop an ability similar to the Sharingan, which allows them to see the flow of the Force in a unique way, predict their opponents' moves better, and even copy some Force techniques. In a Naruto - Star Wars crossover fanfiction, Naruto himself could be transported to the Star Wars galaxy and his chakra-based powers could be reimagined as a new form of Force ability, with his Sharingan - like dojutsu being a rare and powerful gift that confounds the Jedi and Sith alike.
One way to combine them creatively is through character crossovers. Imagine Naruto characters having the Force in the Star Wars universe. For example, Naruto could be a Jedi with his chakra being like the Force, using his ninja skills along with lightsaber - like weapons. Another aspect could be the story settings. The Hidden Villages in Naruto could be like planets in the Star Wars galaxy, with different clans having their own unique cultures similar to different species in Star Wars.
One way to combine them is by creating a crossover universe. Imagine if the magic from Garry Potter's world collided with the technology and diverse species of Star Wars. The Emperor could be a powerful dark wizard in this new universe, using both Sith powers and magic spells. Maybe he could rule over a hybrid empire of wizards and Star Wars species, using his dark arts to control both magic and the Force.
Another aspect to consider is the story arcs. Just as in Star Wars Rebels there are character developments and plot twists, in a WW2 - inspired fanfiction, these could be based on real historical events. For instance, a character could be inspired by the story of Dunkirk, where they face seemingly impossible odds but manage to survive and come back stronger, much like the Rebels in their battles against the Empire.
One way to combine them could be to set a Star Wars story in a universe with the aesthetic of Heavy Metal 1981. For example, imagine a Star Wars story where the technology has a more gritty, industrial look like in Heavy Metal. The characters could have a darker, more edgy vibe. Maybe the Sith lords in this fanfic have a more heavy metal - inspired appearance, with spiky armor and wild hair.
A Star Wars and Disney princess fanfiction idea could be that Jasmine is a rebel spy in the Star Wars universe. She uses her skills of stealth and charm, which she developed in Agrabah, to gather intelligence for the Rebel Alliance. Another idea is that Mulan joins the Jedi Order. Her martial arts skills and strong sense of duty would make her a great Jedi.
One way to blend Asura's Wrath and Star Wars fanfiction is through character crossovers. Imagine Asura in the Star Wars universe, his immense power would make him a force to be reckoned with. He could face off against Sith Lords, using his unique combat style. Another aspect could be the adaptation of Asura's story elements into the Star Wars lore. For example, the concept of wrath and vengeance could be paralleled with the dark side of the Force.