Adventure Comics #467 features the Bronze Age revival of Plastic Man and (more importantly) the first appearance of STARMAN!

The Ted Knight Starman, that carried a gravity rod? Nope. The Starman that was actually Batman in an alternate identity? Nah. Star-man, the villain who fought Batman, Robin & Batwoman. No way. This is Prince Gavyn, the spoiled, playboy prince, mutant from another galaxy.