You could create a plot where the T - 3000 is actually a key to unlocking a hidden power in the other universe. But it doesn't know this at first. As the story progresses, different characters from both universes try to either control it or help it realize its true potential. This would lead to a lot of interesting character interactions and power struggles. For instance, a group of rebels in the other universe might see the T - 3000 as their only hope against an oppressive regime, while the regime itself wants to use the T - 3000 to gain even more power.
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.
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.
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.
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.
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.
You can start by thinking about the worlds of the two shows or franchises you want to cross. For example, if crossing with Ben 10, you could have the Beetleborgs' dimension start to merge with Ben's. The Beetleborgs would have to figure out how to stop it while also dealing with the aliens that Ben 10 usually battles. This creates a unique situation where they have to adapt to new enemies and environments.
You can start by choosing an unexpected crossover partner. For example, a crossover with Alice in Wonderland. The Major could fall into the Wonderland world and her cybernetic enhancements could be seen as strange and magical. The plot could revolve around her trying to find a way back to her own world while dealing with the illogical rules and characters of Wonderland.
You can start by choosing an unexpected crossover partner. For instance, if you cross it with a fantasy series like Lord of the Rings. The duelists from Zexal could enter Middle - earth and their duel monsters could interact with the magical creatures there. The goal could be to use dueling to stop an evil force that threatens both worlds.
Think about an alternate universe where the Naruto and Avatar worlds have been merged for centuries. There could be new clans that are a mix of both worlds' bloodlines. The plot could revolve around a mystery related to these clans and their hidden powers. And the 'lemon' part might come in when exploring the relationships within these new clans, like a Romeo - Juliet type of situation where characters from different 'halves' of the merged clans fall in love.