\"Secret Invasion\" is a comic book crossover storyline that ran through a self-titled eight-issue limited series and several tie-in books published by Marvel Comics from April through December 2008. The story involves a subversive, long-term invasion of Earth by the Skrulls, a group of alien shapeshifters who have secretly replaced many superheroes in the Marvel Universe with impostors over a period of years, prior to the overt invasion. Marvel's promotional tagline for the event was \"Who do you trust\".
The premise is that Skrulls - the alien shapeshifters Captain Marvel helped find a new home in the MCU - have been slowly invading Earth for years. They've secretly replaced multiple superheroes in addition to government officials and even regular citizens, and now they're committing to an overt invasion. 781b155fdc