Another way is to consider Orochimaru's snake - based abilities. In a crossover with the Mortal Kombat universe, he could be related to the race of Shokan. His snake forms could be a new type of transformation in that universe. You could also play with the idea of Orochimaru's morality in different universes. In a world like that of My Little Pony, his devious nature would stand out even more and create interesting conflicts.
To make it truly unique, you could blend Orochimaru's backstory with a completely different cultural mythology. Say, in a crossover with Norse mythology. Orochimaru could be a shapeshifting trickster like Loki. He could be involved in the battles between the gods and the giants, using his ninja skills and thirst for knowledge to manipulate the situation for his own gain. This would require a deep understanding of both the Naruto universe and Norse mythology to create a rich and engaging fanfiction.
A unique plot could involve the T - 3000 being reprogrammed by an unexpected force from the other crossover universe. This new programming could give it a whole new set of goals and morals, which would completely change its role in the story.
Combine different magic systems. For example, if crossing with the Magicians world, mix the Hogwarts magic with Brakebills' magic. The champions could struggle to adapt to new spells and incantations. Another way is to change the nature of the tasks. Instead of the usual tasks, make them more like a detective mystery where the champions have to solve a magical crime to progress in the tournament.
By combining different worlds' rules. For example, if Naruto is banished to a world like Middle - earth from Lord of the Rings, his ninja skills like shadow clones would be very different from the magic there. It can create unique situations where he has to learn new powers or face new enemies. Also, his banishment can be a way to introduce a fish - out - of - water story, which always has potential for interesting plots.
First, think about the characteristics of the cards you want to cross over. If it's a monster card, consider the stats, type, and abilities. For example, if you're crossing a Winged Beast from the original series with a Machine - type from GX, you might give it the ability to fly like a Winged Beast but also have some mechanical enhancements. Second, look at the lore of both cards or series. You can base the new card's backstory on that. For instance, if a card has a story about an ancient power in one series, combine it with a similar concept from another series.
Mix the cultures. For example, if crossing with the Game of Thrones universe, combine the complex politics of Westeros with the four - nation system of the Avatar world. Maybe there's a power struggle over the Iron Throne, but the benders have their own influence due to their powers. Another way is to create a new threat that can only be defeated by the combined powers and knowledge of both universes.
You could combine the powers of Spider - Man and Venom in a new way for a unique character. For example, a character who has the agility of Spider - Man and the shape - shifting ability of Venom but can also control the symbiote in a more conscious way, like using it as a shield or a weapon at will.
A unique plot could involve a CW character who is a detective trying to solve the mystery of the Beast's curse as if it were a crime. They could interview the servants, gather clues around the enchanted castle, and try to piece together what really happened to the Beast.
You can combine the traits of characters from both series. For example, a character could have the Sharingan from Naruto and the wings of a devil from Highschool DxD. This would give them a very distinct look and set of abilities.
Well, you could start by thinking about the two universes you want to cross. For example, if it's Percy Jackson and Star Wars. Maybe Percy gets transported to the Star Wars universe. He could use his powers in unique ways, like using water manipulation to deal with the desert planets. His demigod abilities would be seen as a strange and new force in that galaxy.
For a more unique plot, consider that the Stranger Things characters are transported to an alternate Hawkins that is completely obsessed with Halloween all year round. The Upside Down has seeped into this version of Hawkins in a different way, and it's all mixed up with the town's extreme Halloween culture. They have to find a way back to their own Hawkins while also uncovering the secrets of this strange, Halloween - infused Upside Down. This could involve meeting alternate versions of themselves and other spooky elements specific to this world.