The coming of Wonder Man! Simon Williams would one day become a stalwart Avenger and Hollywood action star. But in his classic debut, he is a brilliant inventor turned dangerous foe for the Avengers - his ionic powers making him strong enough to go toe to toe with Thor, Iron Man, Captain America, Giant-Man and the Wasp! But why has the newly empowered Wonder Man allied himself with Baron Zemo and his Masters of Evil? Can the Avengers find a way to shake his loyalty? And as Earth's Mightiest Heroes are lured to the Masters' compound, will everybody make it out of this confrontation alive - or will a hero make the ultimate sacrifice? The epic story of Wonder Man begins here! It's one of the all-time great Marvel comic books, boldly re-presented in its original form, ads and all! Reprinting AVENGERS (1963) #9.