I think Scarlet Witch and Raven would be an interesting pair. Scarlet Witch with her reality - warping powers and Raven with her dark magic and empathic abilities. They could have a deep connection on a magical level. And then there's Spider - Man and the Flash. Their different personalities, with Spider - Man's quippy nature and the Flash's more light - hearted attitude, combined with their unique powers (Spider - Man's agility and web - slinging vs. the Flash's super - speed) would create some really fun and exciting storylines.
Definitely Superman and Captain America. They both represent the ideals of their respective universes. Superman with his superhuman strength and unwavering moral compass, and Captain America with his leadership and never - give - up attitude. Another interesting pairing would be Batman and Iron Man. They're both brilliant inventors and strategists, and seeing them compete or collaborate on a project would be fascinating.
Spiderman and Green Lantern. Green Lantern's power ring can create all kinds of constructs, and Spiderman could use his webs to enhance or modify those constructs. They could work together to build a huge structure to stop a giant alien invasion that is threatening both the Marvel and DC universes.
The Arbiter and Thor. Thor is a powerful Asgardian with his hammer and lightning powers, while the Arbiter is a skilled warrior from the Halo universe. They could fight side by side against a common enemy. Their different cultures and fighting styles would make for an exciting combination. Maybe Thor could teach the Arbiter about magic, and the Arbiter could show Thor some unique Covenant combat techniques.
Naruto and Spider - Man would be really interesting. They are both young heroes with a strong sense of justice. Naruto could learn some of Spider - Man's acrobatic moves and Spider - Man could be intrigued by Naruto's chakra - based powers. They could also bond over their experiences of growing up without parents in a way.
I think Thor and Wonder Woman would make an amazing pair. They both come from god - like lineages. Thor with his Asgardian powers and Wonder Woman with her Amazonian and divine powers could have some epic battles together against common foes. Their different yet powerful fighting styles would complement each other well.
Gohan and Robin would be an interesting pairing. Gohan, with his intelligence and powerful fighting skills, could bond with Robin over their shared smarts and desire to protect their respective worlds. They could exchange knowledge about combat strategies and detective work.
Maeve and Wonder Woman could be an interesting pair. They are both strong female characters, but from very different backgrounds. Wonder Woman could show Maeve a more noble way of using her power, while Maeve could expose Wonder Woman to the harsher realities of the world she lives in.
Alphys and Iron Man. Alphys is a scientist in Undertale who is a bit of a klutz but also brilliant. Iron Man is a genius inventor in Marvel. They could collaborate on some crazy technological inventions. Alphys could learn a lot from Iron Man about presenting herself more confidently, and Iron Man could be intrigued by Alphys' unique approach to science that comes from the Undertale world.
Another great pairing would be Sasuke and Wolverine. They both have a dark and brooding side. Wolverine's regenerative abilities and his adamantium claws could be compared to Sasuke's Sharingan and his various ninja weapons. They might start off as rivals, but eventually come to respect each other's skills in combat. Also, they could both share stories about their past traumas and how they overcame them to become the strong fighters they are today.
Supergirl and Iron Man would be an interesting pairing. Tony Stark could be fascinated by her Kryptonian technology and try to study it. Meanwhile, Supergirl would be intrigued by Stark's genius and his suits. They could have some really fun banter while saving the world from a new threat like Ultron who has incorporated some Kryptonian elements into his design.
Definitely Naruto and Batman. Batman would be fascinated by Naruto's powers and his different way of fighting. Naruto, on the other hand, could learn a lot from Batman's strategic thinking. Another interesting pairing could be Naruto and Wonder Woman. They both have strong beliefs and a sense of justice. Their combined strength would be amazing in a fight.