What could a 'Ben 10 Avengers fanfic' be about?

In this fanfic, perhaps the Avengers initially don't trust Ben because he's an unknown with such powerful and strange abilities. But then, when a common enemy attacks, like an alien race that wants to conquer Earth, Ben proves himself. He uses his different alien forms to complement the Avengers' skills. For example, using XLR8's speed to assist Quicksilver in a rescue mission. And throughout the story, they learn to work together and form a strong alliance.

One interesting crossover could be Ben using his alien forms to help the Avengers in combat. For example, Four Arms could provide extra strength in a fight against a powerful enemy like Thanos. Another could be Heatblast teaming up with the Human Torch to create an even more intense heat-based attack.

In a Ben 10 Avengers crossover fanfiction, the story might involve Ben and the Avengers sharing their technology and knowledge. Maybe Iron Man could upgrade some of Ben's alien tech, while Ben could show the Avengers some unique alien abilities they've never seen before. It could also lead to some interesting character dynamics, like Spider - Man and Ben comparing their powers and how they use them to protect the city.

It could be about their relationship. Maybe exploring how they first met or how their relationship developed over time in the context of the 'Lost' island's strange happenings.

A cool plot might be that a new villain emerges who has the power to steal the powers of superheroes. This villain targets both Ben's aliens and the Avengers. Ben and the Avengers have to work together to not only stop the villain from stealing more powers but also find a way to get their powers back. Ben's knowledge of his Omnitrix and the various alien weaknesses could be crucial in devising a plan, while the Avengers' combat experience and teamwork skills would be invaluable in facing the challenges along the way.

One possibility could be that Ben Grimm, as The Thing, brings his unique strength and loyalty to the Avengers. His rocky exterior could be a great asset in battles, like providing cover for his teammates. He might also have some interesting interactions with the other Avengers, especially those with a sense of humor like Tony Stark. They could make some witty remarks about his appearance while also respecting his power.

Well, they could go on adventures where their new - found feelings add an extra layer of tension. For instance, when they're in a dangerous situation, Ben might be more protective of Gwen because of his love for her.

It could be about Ben Wyatt being transported into the Star Trek universe. Maybe he uses his skills, like his financial acumen, to help the crew of the Enterprise solve some sort of economic crisis on a new planet they encounter.

One possible plot could be that Ben 10 and Sandra Lemon team up to solve a mystery in their town. Maybe there's a strange alien device causing havoc and they use Ben's powers and Sandra's intelligence to figure out how to stop it.

Maybe it could be about Ben Shapiro having an unexpected encounter with Hamburger Helper. Like, he's making a point in one of his debates and suddenly a box of Hamburger Helper comes to life and starts arguing with him about economic policies or something equally absurd.