In the "Avengers vs. X-Men" story arc, Captain America attempts to apprehend Hope Summers of the X-Men. She is the targeted vessel for the Phoenix Force, a destructive cosmic entity. Captain America believes that this Phoenix Force is too dangerous to entrust in one person and seeks to prevent Hope from having it. Cyclops and the X-Men believe that the Phoenix Force will save their race, and oppose Captain America's wishes. The result is a series of battles that eventually take both teams to the blue area of the moon. The Phoenix Force eventually possesses the five X-Men present, leaving the Avengers at an extreme disadvantage. The "Phoenix Five", who become corrupted by the power of the Phoenix, are eventually defeated and scattered, with Cyclops imprisoned for turning the world into a police state and murdering Charles Xavier after being pushed too far, only for him to note that, in the end, he was proven right about the Phoenix's intentions. From there, Captain America proceeds to assemble the Avengers Unity Squad, a new team of Avengers composed of both classic Avengers and X-Men.