Al McWilliams' art on "Justice Inc." is serviceable but terribly dated for that era. It looks like something from a late 50s Charleton comic, during a time where guys like Adams, Wrightson, Smith and Starlin were breaking boundaries and expanding the medium. That alone would have hurt the book's chances.

Kirby's stuff was better but, as your source notes, his heart clearly wasn't in it.

The first issue cover by Joe Kubert shows what could have been. While I know Kubert of that era would have been busy with war comics and setting up his art school, it's very unfortunate that he wasn't given lead art duties that the project. A Kubert "Justice Inc.," in era of experimental comics like "Warlord" selling big numbers, could have been a real contender for DC.