"Four ordinary people -- struck by black spheres - became extra-ordinary!"
Storyline
The JSA, with new member an adult Robin, confront and are defeated by four normal persons on Earth-2, powered by black matter from another universe. When they ask for help from the JLA using Johnny's T-Bolt, he brings them a battered JLA team, suffering the same problem as their counterparts. Both groups them learn the black matter's origins, and resolve to end the problem on Earth-2 first, lest both worlds be destroyed.
Story Notes
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Story across 23 pages in two parts of 11.5 and 10.5 pages. Story continues in #56.