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.
Ben would probably be in awe of the Avengers at first. He might try to show off his alien forms to impress them. The Avengers, on the other hand, would be cautious. Tony Stark might want to study Ben's Omnitrix. Thor could be interested in the power of Ben's alien forms that are related to strength and lightning.
First, you need to decide on the main plot. For example, a new threat emerges and the Avengers must reunite. Then, choose your favorite Avengers characters to include. You can start with the classic ones like Iron Man, Captain America and Thor. Next, create interesting dialogues for them. It's important to keep their personalities true to the original. For instance, Iron Man's witty remarks and Captain America's moral leadership. Finally, describe the action scenes vividly to make the fanfic exciting.
One great idea could be Ben using his Omnitrix to transform into an alien that has a power similar to one of the Avengers. For example, turning into an alien with super strength like the Hulk and having a friendly competition with him. Another idea is that the Avengers could mistake Ben for a threat at first because of his alien forms and then they realize he's actually on their side. They could then team up to fight a common enemy, like a powerful villain from the Ben 10 universe that has somehow made its way into the Avengers' world.
Well, let's consider Ben's alien form that can absorb energy. When combined with Hulk's raw power, they could create a situation where the alien absorbs Hulk's excess energy during his rage - filled moments. This would not only prevent the Hulk from causing too much destruction but also use that absorbed energy to power up the alien form for a more powerful attack. And in the case of Black Widow, Ben could transform into an alien with enhanced agility and stealth, and together with her combat skills, they could infiltrate enemy bases more effectively.
It could be about Ben 10 characters joining forces with the Avengers to fight a common enemy. For example, they might team up against a powerful alien or a super - villain who has the ability to cause chaos on a global scale. Ben's alien forms could bring unique powers to the alliance, while the Avengers' skills and teamwork would also play a crucial role.
Another theme is power and responsibility. Since the Avengers are powerful heroes, fanfics often explore how they handle their powers. Some stories might show a character struggling with the consequences of using their powers too recklessly.
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.
In this Avengers assemble dracula fanfic scenario, the Hulk might be a wild card. He could just smash Dracula without much thought. But Dracula is not an easy foe. He has centuries of combat experience. Black Widow and Hawkeye would also play important roles. Black Widow could use her combat skills and intelligence to find Dracula's lair and Hawkeye could shoot his arrows, perhaps ones with silver tips which are effective against vampires.
Characterization. If it really nails Bruce's complex personality, it stands out. For example, showing his intelligence as a scientist and his insecurities about the Hulk.
Yes, it could be a must - read. Fanfics about Bruce in the Avengers universe can offer unique perspectives. They might explore his character deeper, like his internal struggles with the Hulk. It could also show different relationships within the Avengers team from his point of view.