Now THIS was comics! In the grand tradition of both anniversary issues and those book-length "messterpieces" of the Golden Age (like HUMAN TORCH # 5), here we have a dimension-spanning, time-traveling, alternate history adventure epic starring Superman, Batman and the regular back-up characters, Wonder Woman, Black Canary and Green Arrow.
After killing Gwen Stacy at Marvel, writer Gerry Conway ams close to redeeming himself with his DC work as a creator/editor/writer in the late seventies. He penned this tale and one of my personal favorites of the non-superstar artists, George Tuska, takes over on the art with Vince Colletta, who was now Art Director continuing. And this was nota BAD thing as Tuska and Colletta made a good team. Around this same time they did the WORLD'S GREATEST SUPERHEROES newspaper strip.
Left out of the main plot line, the Creeper makes up for it by getting his origin retold in one of Steve Ditko's best DC pieces of all time.