Welcome to the future...
...which looks a lot like the past, as shown in heroic fantasy fiction!
Riding high on the success of the Sword of the Atom mini-series and follow-up annuals which re-imagined the hard sci-fi character in a barbarian adventure setting, Gil Kane (along with collaborator Jan Strnad) was given the go-ahead for another high-adventure series, this time based on a new character.
Planned as a 12-issue mini-series, cutbacks at DC dictated that the already-penciled and scripted first two issues be combined into a one-shot whose sales would determine if the project would continue.
Unfortunately, the unfamiliar character didn't attract a large enough audience (as The Atom had), and only the single, open-ended issue came about.
BTW, if you're thinking the plotline seems familiar, It's because Kane based it on the Biblical tale of Moses and the Exodus from Egypt, transposed into a barbaric future!