While ‘Black Adam’ may currently be a surprising new addition to the ‘Justice League’, once upon a time, he was one of DC Comics’ strongest villains - and one of the few people to ever win against ‘Superman’ himself. While Adam has always had a staunch personal code, that didn’t stop him from allying himself with questionable characters in his homeland Kahndaq. And when one such alliance put him in the crosshairs of the ‘Man of Steel’, Adam showed Kal-El just how powerful the Strength of Amon really is.
In the leadup to Infinite Crisis by Geoff Johns, Phil Jimenez, and more, the villains of the DC Universe - including Black Adam - found themselves united with a common goal. At the time, Adam did whatever he felt necessary to protect his people, even if that meant joining an arm of evil to keep them out of his home. But it was in Action Comics #831 by Gail Simone and John Byrne that Adam’s loyalty to the cause was really put to the test.
When the villainous ‘Dr Psycho’ uses his telepathic abilities to manipulate the people of Metropolis, Superman tracks the madman and finds him under the supervision of ‘Black Adam’ who claims he knows nothing of his charge’s crimes. Knowing that Adam has recently severed ties with his allies in the ‘Justice Society’, ‘Superman’ confronts the Wizard’s former champion, only for ‘Psycho’ to use his abilities to make Adam strike first.
Forced into a battle, the two titans slug it out with Adam essentially refusing to strike ‘Superman’ and protesting his innocence in Psycho's schemes the entire time. Just as Superman launches into his final blow, Adam ends the fight by turning his back on his foe - knowing that the honorable Man of Steel would never hit a man in the back. While it’s far from the most climactic finish to a battle between such powerful players, it says a lot of Black Adam’s personality and capabilities as a warrior. —Screen Rant