Marvel Comics’ “Secret Invasion” is a major crossover event that occurred in 2008. The storyline revolves around the infiltration of Earth by the shapeshifting alien race known as the Skrulls, who have secretly replaced a number of Marvel superheroes with Skrull imposters.
The Skrulls have been planning this invasion for years, and their goal is to conquer Earth and make it a new home for their people. The Skrulls have used their shapeshifting abilities to infiltrate the highest levels of Earth’s governments and superhero teams, including the Avengers and the Fantastic Four.
The story begins with the discovery of a dead Skrull on Earth, which leads to the realization that the Skrulls are among them. The Avengers and other heroes are forced to confront the fact that their own ranks may be compromised, and they must work together to uncover the extent of the Skrulls’ infiltration.
As the story progresses, the Skrulls reveal their ultimate goal: to use their advanced technology to create a “Secret Invasion” that will allow them to conquer the Earth. The Avengers and their allies must fight against the Skrulls and their imposter agents to save the planet from the alien invasion.
The “Secret Invasion” storyline has major consequences for the Marvel Universe, including the deaths of several major characters and the revelation that some heroes have been Skrull imposters for years. The storyline was highly successful, and it has been adapted into other media, including an animated TV series and a live-action Disney+ series set to release in the Summer of 2023.