I think DC Comics is leaving some money on the table not publishing collections of the 1990s Showcase series. The odd Robin story or such has been collected here or there, but in no way have the depths of this been plumbed. I don’t know exactly how much audience there is for a Blue Devil story from the 1990s, though it is by Blue Devil’s creators Gary Cohn and Dan Mishkin — and then in Showcase '93 alone there is a Peacemaker story with Kobra et al. by Mike Baron, Fire and Ice by Elliot S. Maggin(!), Shining Knight by James Robinson, and on and on.

Point being, some of these are multi-part stories, and as DC continues to try to find success with anthologies in the modern age, carving these out of their individual issues and putting them together to be read story by story in a collection might be entertaining.