A really cool plot for an avengers imagines fanfic could be an adventure where the Avengers are shrunk down to microscopic size. They have to navigate through a human body to stop a virus that was created by a villain as a biological weapon. This would require them to use their powers in very creative ways and face challenges like antibodies attacking them as if they were foreign invaders.
One idea could be an imagine where a new superhero joins the Avengers. They have a unique power that the team initially struggles to understand but eventually learns to utilize effectively. For example, a hero with the power to manipulate time on a small scale, like being able to slow down time for a few seconds during a battle.
One idea could be exploring what if Loki had an unexpected ally within the Avengers. Maybe a character who was initially on the heroes' side but got swayed by Loki's charm or promises.
One plot idea could be that the Inhumans' city of Attilan is in danger and the Avengers are called in to help. The Inhumans are initially hesitant to accept their aid due to their differences, but they soon realize they need to work together. Another idea is a young Inhuman with a powerful but uncontrollable ability is found by the Avengers. They try to help the Inhuman learn to control it while also protecting them from those who would use their power for evil.
A more complex plot could involve the Flash's speed force interacting with the Infinity Stones. The Avengers might be trying to figure out how to use or contain the power of the speed force in relation to the Stones. This could lead to all kinds of conflicts and alliances within the story, as different characters have different ideas about how to handle such a powerful and unknown combination of forces.
Maybe a story where the Avengers are transported to Supergirl's universe. They have to adapt to her world's rules and help her fight against a powerful villain there. This could involve a lot of world - building and character development as the Avengers learn about Supergirl's allies and enemies.
A plot could revolve around the Avengers Prime traveling through time to prevent a future disaster that they somehow caused. Along the way, they meet different versions of themselves and have to make tough decisions about changing the timeline.
Well, perhaps they are turned into teenagers due to some villain's new weapon. As teenagers, they start to view the world differently. Tony Stark as a teen might be more reckless and impulsive, causing some chaos within the team. They could also face typical teen issues like crushes. Steve Rogers might have a hard time adjusting to the modern teen culture of dating and social media while still being a hero.
One idea could be that the next - generation Avengers have to face a new villain who has the power to manipulate time. They must travel through different eras to stop the villain from changing key events in history that would lead to the destruction of the world as they know it.
One idea could be that the Avengers have to deal with a supernatural force that is causing chaos in the city. Maybe it's a powerful demon that they can't defeat with their usual weapons and tactics. They then seek help from the Supernatural world, like Sam and Dean Winchester, who teach them about exorcisms and using holy water.
One idea could be that the Avengers are accidentally transported to a movie set where the cast is filming their story. They initially think it's some kind of new villain's trick. Another could be that the cast members get to experience the powers of the Avengers for a day through a magical mishap.
One idea could be that the Avengers are all students with different cliques. Iron Man could be the rich, popular kid who's a bit of a show - off with his high - tech gadgets. Captain America is the new transfer student who stands up for the underdogs. And they have to come together to deal with a bully who has some sort of super - power.