Justice League of America #89 (DC, 1971)

One of the best art teams of the Bronze Age, Neal Adams and Dick Giordano helped establish the new look of superheroes for DC Comics. Doughy 40 year old heroes were out and muscular 29 year olds were in! This story was a bit of meta-fiction as real-world writer Harlan Ellison is cast as the main character who dreams himself into the DCU with cover co-stars Flash, Hawkman, Green Lantern, Aquaman, Black Canary, Green Arrow, and a faceless Superman and Batman!