In previous matchups and meetups between the Justice League and Justice Society, there were generally random pairings of each team meshing together to face a common threat. Taking a que from their seventh case when the two Supermen met for the first time (while the Green Lanterns joined forces once more) and the eight case when some JSA members' defeat caused their JLA counterparts to also succumb to the same snares, their ninth teamup finally showcased power-pairings of five counterparts. While a sixth pairing, the Flash of two worlds, was nixed since Earth-One's Fastest Man Alive was quickly defeated, the former Boys Wonder known as Robin first met each other. Since we've considered those two on this case previously, lets consider how the other dual dopplegangers faired when facing the alien threats of A-Rym and his pet Teppy, later joined by Solomon Grundy himself!
This adventure provides a reminder of the repoir between the Flashs, Green Lanterns and Atoms who up to that point built friendships with one another, while glimpsing the budding relationship between the Supermen and quite frankly the only chance to see the Robins and Hawkmens together.