CAPTAIN AMERICA JOINS THE FIGHT! MILES MORALES and IRON MAN recruit CAPTAIN AMERICA to defend against the scourge of the Ultimate Negative Zone - HOSTILICUS! What side is the newly born WONDER MAN really on? Will reality-bending SIGHTSEER master her frightening power before it's too late? Even if Hostilicus is defeated, the Ultimate Gem of Cyttorak-powered MOGUL's scheme grows in the shadows -- to what end?!