Definitely Loki. Loki's mischievous nature combined with Venom's violent tendencies would be a wild combination. They could either team up to cause mayhem among the Avengers or be at odds with each other, each trying to outwit the other. It would be a battle of wits as well as strength, and the Avengers would have a really hard time dealing with them.
I think Spider - Man would be really interesting. Since in the comics, Venom has a long history with Spider - Man, and if you bring that into the Avengers' world, it could add a whole new layer of drama. The Avengers would be caught in the middle of their relationship, not fully understanding the complex history between them.
Definitely Naruto. His positive attitude and strong will could create a really interesting dynamic with Venom. He could either try to reform Venom or use its power for good in the Naruto world.
Definitely Venom and Spider - Man (if he's considered part of the Avengers in this fic). Since Venom has a history with Spider - Man, their interactions within the Avengers context would be super interesting. Spider - Man would be constantly on edge around Venom, while Venom might taunt him. Another interesting pair could be Venom and Iron Man. Iron Man would be trying to analyze Venom's symbiotic nature, and Venom would probably not like being treated like a science experiment.
In a 2018 crossover, Venom might bring a new style of fighting to the Avengers. His symbiotic powers allow him to move in unique ways and his strength is on par with some of the stronger Avengers. He could also introduce the idea of a more street - level threat that the Avengers usually don't deal with directly. This could expand the scope of their operations and how they view threats in the city.
In some fanfictions, Venom could be integrated by having a symbiote-infected character join the Avengers. Maybe a character like Spider - Man, who has a history with Venom in the comics, brings the symbiote's knowledge and power to the team. This could create new conflicts within the team as they deal with the more violent and unpredictable nature of the symbiote.
One idea could be Venom bonding with Hulk. Imagine the power boost and the chaos they could cause together. Another is Venom facing off against Thor. The contrast between Thor's godly powers and Venom's alien abilities would make for an exciting battle. Also, Venom could team up with Black Widow and use his stealth and her combat skills for some undercover missions.
It's really hard to say who would win. The Avengers are a powerful team with diverse abilities, but Venom is no pushover. If the Avengers can work together well, they might have the upper hand. But if Venom manages to isolate and take down some of the Avengers one by one, he could win.
Goku and Captain America. Goku is all about pure power and his simple - minded pursuit of getting stronger. Captain America, on the other hand, represents honor, leadership, and strategy. The contrast between them would be fascinating. Goku could learn about leadership from Cap, and Cap could be inspired by Goku's unwavering determination to keep getting stronger.
I think Hermione would be really interesting. She's already very intelligent and resourceful. If she got the Venom symbiote, she could use its powers to access areas that are normally restricted in the wizarding world, like the restricted section of the library, and find new spells and knowledge. She could also use the symbiote's physical abilities to protect her friends during dangerous situations.
In fanfiction, Venom could interact with the Avengers in many ways. For example, he might initially be seen as a threat and the Avengers try to subdue him. But then they could discover that he has some common enemies, like certain powerful villains who are a menace to both him and the Avengers. So, they could form an uneasy alliance.
One possible storyline could be Venom getting involved in an Avengers mission. Maybe Venom's unique abilities like his symbiotic powers and super strength could be used to help the Avengers against a common enemy. For example, against a powerful alien threat that the Avengers alone can't handle. Venom's ability to blend into the shadows and his near - indestructibility could give the Avengers an edge in battle.