Alice and Hawkeye would be a cool combination. Alice can see the future and Hawkeye has his amazing archery skills. They could use Alice's visions to plan Hawkeye's attacks more effectively. Also, Jasper and Captain America. Jasper's ability to sense and manipulate emotions could be really useful for Captain America when leading the team. And Captain America could teach Jasper about loyalty and honor in a more traditional sense.
I think Thor and Carlisle would be really interesting. Thor is a god with all his power and Carlisle is an old - school vampire with a strong moral code. They could have some deep conversations about life, death, and power. And then there's Jacob and Bruce Banner. Jacob's hot - headedness and Bruce's struggle with his inner Hulk could lead to some intense situations. Maybe Jacob could help Bruce control the Hulk in some way, or they could get into a big fight that the others have to break up.
Definitely Superman and Thor. They both have super strength and are associated with powerful, other - worldly elements. Thor has his hammer and lightning powers, while Superman has his super - strength, heat vision, etc. It would be interesting to see them compete in a friendly strength - based challenge or fight side by side against a really strong foe.
Hulk and a mermaid with strong physical abilities. The Hulk is all about brute strength on land, and the mermaid could have enhanced strength in the water. Imagine if they had to work together to move a huge object that was blocking a passage underwater or on land. The mermaid could use her fins and water currents to help guide the Hulk's massive strength in the right direction, and the Hulk could protect the mermaid from any threats on land.
I think it would be Loki. In this crossover, Loki could use his trickery to manipulate the Twilight vampires. He might see them as a new tool to achieve his goals. He could pretend to be on their side and then turn on them when it suits him. His magic and cunning would add a whole new level of chaos to the story.
One of the most intriguing combinations is Harley Quinn and Alice Cullen. Harley's chaotic and unpredictable nature paired with Alice's calm and prescient abilities would create a really interesting dynamic. They could either be at odds or find a strange kind of friendship. Another good combination is Deadshot and Edward Cullen. Deadshot's sharpshooting skills and his more jaded view of the world contrasted with Edward's brooding and his vampiric powers would make for some great scenes.
Definitely Thor and Tsukiyama. Thor, the god of thunder, with his powerful hammer, and Tsukiyama, the flamboyant ghoul. Tsukiyama's refined tastes and his kagune skills could be paired with Thor's brute strength. They could have some hilarious banter as they fight side by side against enemies. And also, Black Widow and Touka could be a great pair. Black Widow's spy skills and Touka's street - smart and combat - ready nature would make them a formidable duo.
How about a Twilight werewolf combined with a DxD devil? The werewolf's enhanced physical abilities and connection to nature, along with the devil's magical powers, could create a very interesting character. They might struggle with their dual nature, being part of two different and often opposing supernatural groups. This internal conflict could add depth to the story.
One interesting combination could be Dominic Toretto and Edward Cullen. Dominic is all about family and loyalty in the Fast and Furious world, and Edward has his own sense of protectiveness over Bella in Twilight. They could learn from each other's ways of safeguarding their loved ones.
A plot could be that the Twilight vampires are mistaken for a new threat by the Avengers. So, there's a lot of misunderstanding and conflict at first. But then they realize that there is a real bad guy who is using their feud to his advantage. They then have to work together to take this villain down. Also, what if some of the Avengers become vampires or werewolves? How would that change their dynamic and abilities? For instance, if Captain America became a vampire, would his sense of justice remain the same? And how would his new powers interact with his old ones?
One interesting combination could be Ice King and Byakuya Togami. Ice King's delusions and Byakuya's arrogance could lead to some really tense and funny interactions. Another could be Lumpy Space Princess and Celestia Ludenberg. Their strong personalities and different ways of expressing themselves would create a lot of drama. And also, Finn and Makoto Naegi. Finn's heroism and Naegi's determination to survive and find the truth could be a great combination as they face the challenges in the fanfiction world.
A werewolf and Zero from Vampire Knight would be an interesting combination. Zero has his own internal struggle with his vampire side, and adding a werewolf into the mix could either be a source of conflict or an unexpected ally. The werewolf's wild and free nature might contrast with Zero's brooding and complex personality.