From my super hero genre history
1980s covered but assume you know about Man of Steel Wonder Woman JLI Suicide Squad and Batman year One
1993 Comic Book Death High Cost of Living The Trade includes Death’s First Appearance in Sandman 8, 1991, Sound of Her Wings Neil Gaiman
1993 Comic Book JSA The Golden Age by James Robinson. Era after World War II to beginning of Silver Age. Main characters Justice Society and other DC Golden.Age characters
1993 Comic Book Batman Adventures 12. Harley Quinn first appearance. Also.Poison.Ivy Barbata Gordon Batgirl Harley introduced on TV Batman’ The Animated Series.
1994 Comic Book. Batman Adventures Mad Love Harley Quinn Joker Paul Dini and Bruve Timm
1994 Comic Book Aquaman 2 Arthur loses hand, replaces with harpoon. Long Hair and attitude influenced Justice League and Aquaman movies decades later. Start of Aquaman as Bad Ass, no Longer a Joke Hero who could only last an hour outside water, whose only power was to tslk to fish… Peter David.
1994 Comic Book Kyle Rayner becomes new Green Lantern
Hal Jordan becomes Parallax
1994 Comic Book Starman Jack Knight, son of original Starman, by James Robinson.
1996 Comic Book Kingdom Come Waid Ross
1996 Comic Book Supergirl 75 to 80 Peter David. Linda Danvers Supergirl meets Silver Age Kara el Supergirl
1997 Comic Book JLA Big Seven return.with epic plots. Superman, Batman, Wonder Woman, Long haired Aquaman, Martian Manhunter, Wally West Flash, Kyle Rayner Green Lantern. Grant Morrison.