You could do a crossover with the Monster Hunter series. Hunters from Monster Hunter might be tasked with hunting down some of the more dangerous Darkstalkers. Or perhaps a crossover with the Kingdom Hearts series. The keyblade wielders could find themselves in the strange and spooky world of Darkstalkers, having to deal with the likes of Felicia and her cat - like abilities.
One idea could be a story where Jedah tries to corrupt Lilith for his own dark purposes. He might offer her power in exchange for her loyalty, but Lilith has to struggle with her own sense of good and the allure of the power. Another could be a scenario where Lilith is the only one who can save Jedah from a greater evil that is threatening to consume him, leading to a complex relationship of trust and mistrust.
First, decide which other universe you want to cross over with. Then, research both the Darkstalkers and the other universe thoroughly. For example, if it's a crossover with the Batman universe, learn about Gotham City and Batman's rogues gallery as well as the Darkstalkers' lore. Next, come up with a plot. Maybe the Darkstalkers' world is being invaded by Gotham villains and the Darkstalkers need Batman's help.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
A Thundercats and Star Wars crossover fanfiction would be really cool. The Thundercats could be in the Star Wars universe, and their unique powers and weapons could be a great addition. Maybe the Thundercats could help the Jedi or the Rebels in their fight against the Sith or the Empire. For instance, Cheetara's speed could be useful in battles, and Tygra's illusions could be used to deceive the enemy.
One interesting storyline could be an OC (Original Character) who is a half - vampire, half - human trying to find their place in the Darkstalkers world. They might struggle with their dual nature, being shunned by both humans and vampires at times.
A Digimon and Sailor Moon crossover is an interesting concept. The Digimon could help the Sailor Scouts in their battles against the Dark Kingdom. The magical powers of the Sailor Scouts combined with the digital powers of the Digimon would create a really unique and exciting story. And a Digimon and Avatar: The Last Airbender crossover. The Digimon could be part of the different nations, and they could use their abilities to help Aang and his friends in their quest to restore balance.
One idea could be an Atreus crossover with the world of Harry Potter. Atreus could be a new student at Hogwarts, bringing his own unique skills and knowledge from his Norse mythology background. He might struggle to adapt to the magic of the wizarding world while also showing off his own combat and survival abilities.
Another option is a crossover with a post - apocalyptic world. The garou's survival instincts and combat abilities would be well - suited for this harsh environment. It could either be a lone wolf trying to survive or join a group of survivors, bringing its own set of skills and challenges to the group.
One idea could be a crossover with the Dragon Ball Z and the Naruto universe. Raditz could land in the Hidden Leaf Village and cause chaos, leading to battles with powerful ninjas like Naruto and Sasuke. Another idea is a crossover with the One Piece world. He might end up on the Grand Line and get involved in the Straw Hat Pirates' adventures. Maybe he would try to steal their Devil Fruits or be forced to team up with them against a common enemy.
Perhaps a Gogeta crossover with the DC universe. Imagine Gogeta facing off against Superman. They are both extremely powerful in their own ways. It could explore a battle of strength, speed, and different types of energy. Maybe Gogeta would be intrigued by Kryptonite and how it affects Superman.