Avengers: Standoff! is a comic book crossover event published by Marvel Comics from February 2016 to April 2016. The event focus on a secret S.H.I.E.L.D. rehabilitation facility known as Pleasant Hill where S.H.I.E.L.D. has been secretly brainwashing super-villains into becoming model citizens and the eventual prison break that results after one of the inmates discovers what has been done to him.