Well, Black Widow and Sam Winchester could be a really cool pairing. Black Widow's stealth and combat skills combined with Sam's research abilities and knowledge of the supernatural could make for some great team - ups. They could also have some deep conversations about their past traumas and how they've overcome them.
I think Captain America and Dean Winchester would be an interesting pairing. Captain America's sense of justice and old - fashioned values would contrast and complement Dean's more rough - around - the - edges attitude. They could bond over their experiences in combat and their loyalty to their respective teams.
I think Percy and Thor would be an interesting pairing. Thor is a god from Norse mythology and Percy is a demigod from Greek mythology. They could compare their powers and stories about their respective gods. Thor's hammer and Percy's sword could be used in some cool battle scenes together.
Danny and Black Widow could also make an interesting pair. Natasha is a master of stealth and combat skills. Danny, with his ability to turn invisible and phase through objects, could team up with her for some sneaky missions. She could also teach Danny some hand - to - hand combat moves, while Danny could show her how to deal with supernatural threats.
Another great pairing could be Hulk and Groot. Groot's calm and gentle nature might have an interesting effect on the Hulk. Maybe Groot could help calm the Hulk down when he's about to go on a rampage, or they could team up in a fight and Hulk could use Groot as a sort of living weapon. It would be a very unique dynamic.
I think Superman and Thor would be a very powerful pairing. Superman has his super strength, speed, flight, and heat vision, while Thor has his godly strength, control over lightning, and his enchanted hammer. Together, they could take on almost any foe. They could fly into space and deal with threats that are far away from Earth.
I think Supergirl and Black Widow would be an interesting pairing. Black Widow is a skilled spy and fighter, while Supergirl has superpowers. They could learn from each other. Black Widow could teach Supergirl some stealth techniques, and Supergirl could protect Black Widow during battles with her super strength and speed.
I think the Doctor and Tony Stark would be an interesting pairing. They are both highly intelligent and have a knack for getting out of tough situations with their wits. They could bounce ideas off each other regarding technology and science, and probably argue a lot about whose tech is better.
I think Wonder Woman and Thor would be a really interesting pairing. They both have a connection to the divine. Thor is the God of Thunder from Asgard, and Wonder Woman is a demigod. They could compare their powers, like how Thor wields Mjolnir and Wonder Woman has her bracelets. Maybe they could even team up in a fight against a powerful magic - using enemy and combine their godly powers to defeat it.
I think Percy Jackson and Thor would make an interesting pairing. Percy has his connection to water and the sea, while Thor is associated with lightning and thunder. They both have a sense of heroism and loyalty. Percy could learn about different forms of power from Thor, and Thor could be intrigued by Percy's ability to control water in such a unique way. They might also have some friendly competitions, like who can control their element better in a given situation.
Rick and Tony Stark would be a really interesting pairing. They are both super - intelligent inventors. Rick's off - the - wall and often unethical scientific methods would clash with Stark's more morally - guided approach. It would be fascinating to see them argue over the best way to build a device or solve a problem.
In 'Avengers meet the Winchesters' fanfiction, there could be some really interesting character interactions. For example, Iron Man might be fascinated by the Winchesters' knowledge of the supernatural and their arsenal of weapons against it. And Dean Winchester could be in awe of Thor's hammer. It could also involve some time - travel or interdimensional elements to bring these two groups together.