Psychedelic Warlords From The ’70s!
Duncan, over here, suggested an OD&D supplement that, in his words, would be:
“a toolkit for running sci-fi games in a trippier vein suggested by early Heavy Metal comics, Metabarons, Jodorowsky’s abortive attempt at Dune, stoner metal, psychedelic rock, (Hawkwind’s Space Ritual, etc.) movies like Zardoz, etc.”
This prompted me to go back and think about these motifs and source materials again.