It was Going to be an Epic 12-Issue Mini-Series...
...but cutbacks at DC dictated that the already-penciled and scripted first two issues Jan Strnad & Gil Kane (the guys who had revamped The Atom into a high-adventure/barbarian hero in two Sword of the Atom mini-series) be combined into a double-length one-shot whose sales would determine if the project would continue.
Unfortunately, despite the genre pedigree both creatives had, the unknown character didn't attract a large enough audience (as The Atom had), and only the single, open-ended, never-reprinted issue exists!