I think Hiro and Iron Man would be a really interesting pairing. They are both brilliant inventors and could come up with amazing tech together.
One interesting pairing could be Black Widow and GoGo. Black Widow is a master spy and fighter, and she could teach GoGo some new combat and stealth techniques. And GoGo's fearless and energetic nature could bring a new dynamic to Black Widow. Another interesting pair would be Captain America and Hiro. Captain America's leadership and values could inspire Hiro, and Hiro could show Captain America the wonders of modern technology. Also, Baymax and Hulk could be an interesting pair. Baymax's calm and healing nature might be able to soothe Hulk when he gets angry.
One interesting pairing could be Izuku Midoriya and Captain America. Izuku is all about the spirit of never giving up and has a strong sense of justice, much like Captain America. Cap could teach Izuku some hand - to - hand combat skills and Izuku could show Cap the potential of quirks. Another cool pairing would be Bakugo and Iron Man. Both are brash and confident in their abilities. Iron Man could help Bakugo upgrade his gauntlets with some Stark tech while Bakugo's explosive personality might give Iron Man some new ideas for his suits.
Hiro and Dash would make an interesting pairing. Hiro is a brilliant inventor and Dash has super - speed. They could combine their skills in a chase scene. Hiro could create some gadgets to enhance Dash's speed or help him navigate obstacles better, while Dash could use his speed to quickly get Hiro to where he needs to be for his inventions or investigations.
I think Black Widow and Mulan would make an interesting pairing. Both are strong female characters. They could share their combat skills and stories of survival. Black Widow could learn some of Mulan's more traditional combat techniques, and Mulan could get tips on modern espionage from Black Widow.
One interesting pairing could be Naruto and Thor. Naruto's exuberant personality and Thor's godly presence would make for an exciting duo. They both have strong leadership qualities. Another would be Sasuke and Black Widow. Sasuke's brooding nature and Black Widow's stealth and intelligence could create a great dynamic. They could learn from each other's combat and espionage skills.
Supergirl and Black Widow would be a great pairing too. Black Widow could teach Supergirl some stealth and espionage skills, while Supergirl could show Black Widow the power of flight and super - strength. They could also bond over their experiences of being different in their respective worlds.
Another great pairing would be Superman and Captain America. Superman is an alien with god - like powers, while Captain America is a human with peak physical and moral strength. Cap could teach Superman about the value of human tenacity and leadership on a more down - to - earth level. And Superman could show Cap what true superhuman power looks like. They could work together to inspire the rest of the Avengers and any other heroes they encounter in a battle.
Mr. Incredible and Hulk. Just think about it. They both have incredible strength, but they also have different personalities. Mr. Incredible is more family - oriented and used to working in a team with his family. Hulk is more of a lone force, but when they team up, their combined strength could be unstoppable. They could have a great dynamic, like Mr. Incredible trying to calm Hulk down when he gets too angry or Hulk teaching Mr. Incredible some new ways to use his strength in a more brute - force manner.
Optimus Prime and Captain America would be really interesting. They are both natural leaders, with a strong sense of justice. Optimus is a noble leader of the Autobots, and Captain America is the moral compass of the Avengers. They could share their leadership experiences and strategies.
For an Arrow - Avengers crossover fanfiction, some really interesting character pairings could emerge. For instance, Malcolm Merlyn and Loki. Malcolm is a master manipulator and Loki is the God of Mischief. They could either team up to cause chaos or be in a constant battle of wits. Also, Cisco Ramon from The Flash (since he often crosses over with Arrow) and Bruce Banner. Cisco could be fascinated by Banner's scientific knowledge and Banner could be interested in Cisco's work on the multiverse. And of course, Quentin Lance and Nick Fury. Quentin, as a police detective, and Nick Fury, as the head of S.H.I.E.L.D., could share their insights on how to keep their respective cities and the world safe.
I think Naruto and Iron Man would be really interesting. Naruto's naive yet determined nature would contrast with Iron Man's sarcastic and high - tech personality. They could learn a lot from each other, like Naruto learning about advanced technology and Iron Man learning about the power of will and chakra.