This issue is a variant of Green Lantern (DC, 1976 series) #201 [Direct Edition]. There exist further variants.
On-sale date from DC Releases #25.
Color credits confirmed by Anthony Tollin.
Vs Star Sapphire, who has remained in this dimension. Vs. Sonar, Dr Polaris and the others from Guy Gardner's villain's group from #197, including Throttle, Polestar, Whiteout and others. Con't in next issue. The indicia remains "Green Lantern".