Throughout the 1960’s, as their upstart rival Marvel Comics distinguished itself with the development of a complex and more-or-less consistent fictional universe that linked all of the company’s heroes, villains, and other characters into one ongoing meta-story, DC Comics resolutely continued to operate as a collection of mostly independent fiefdoms, each under the dominion of its own editor.  Sure, all the A-list heroes showed up for Julius Schwartz’s Justice League of America, regardless of who was editing the heroes’ solo series, and they could also pair off in George Kashdan’s (later, Murray Boltinoff’s) The Brave and the Bold — but, by and large, DC’s editors didn’t pay much attention to continuity across the line.

Within an individual editor’s purview, however, there were occasional stabs at crossovers and other signifiers of a shared universe — especially within the books guided by Schwartz.  As we’ve discussed in a previous post, one way Schwartz accomplished this was be establishing close friendships between pairs of his heroes (Flash and Green Lantern, Atom and Hawkman) which provided frequent opportunities for guest-shots in one another’s books.  Another way was to set up a plotline in one book that would carry over into another book — as was done in the classic “Zatanna‘s Search” story arc that ran through multiple Schwartz-edited books from 1964 through 1966, culminating in Justice League of America #51’s “Z — as in Zatanna — and Zero Hour!”.     Read More