"Secret Empire" is a 2017 Marvel Comics crossover storyline published by Marvel Comics, consisting of a 10-issue, eponymous miniseries written by Nick Spencer and illustrated by Rod Reis, Daniel Acuña, Steve McNiven, and Andrea Sorrentino, and numerous tie-in books. The storyline addresses the aftermath of the storyline "Avengers: Standoff!" and the ongoing series Captain America: Steve Rogers, in which Captain America has been revealed to be acting as a sleeper agent and covertly setting the stage to establish the terrorist organization Hydra as the main world power. The entire crossover received mixed reviews.