From Wikipedia:
"Later in the series, it is revealed that Harada has in fact been mentally manipulating the Harbinger rebels, and Pete and Harada face off in a battle royale. Harada is left comatose and Pete supposedly powerless. Pete's fellow renegades go their separate ways, with Pete wandering off into the night with his teammate Flamingo, only to resurface later on as "The Harbinger," an armored, brainwashed servant of Harada, hunting down new rogue Harbingers. He is opposed by the mysterious masked hero "The Visitor," who in turn is revealed to be an alternate future version of Pete himself. At the close of the Visitor's self-titled series, the present-day Pete breaks free from his programming and is forced to join forces with Harada and the Visitor to save the world from an alien invasion. After their triumph and the death of the Visitor, Pete warns Harada to leave him and Flamingo alone."