Captain Marvel and the Avengers face the enemy within! When vicious echoes from the past of Earth's Mightiest Heroes crop up all over Manhattan, Carol Danvers refuses to be grounded by her recent and mysterious loss of power. But who is the sinister figure behind the madness and what does it have to do with Carol's calamitous condition? And the most disturbing question of all ...is this villain even real? COLLECTING: CAPTAIN MARVEL (2012) 13-17, AVENGERS: THE ENEMY WITHIN 1 , AVENGERS ASSEMBLE 16-17