Creeper image taken from splash.
This story has multiple chapters.
Chapter One (15 pages): The Reality War! features Superman and Batman.
Chapter Two (16 pages): Collision With Destiny features Green Arrow, Black Canary and Wonder Woman.
Chapter Three (25 pages): The Ravager of Time features The World's Finest Team.
On page two a notice reads "with grateful acknowledgement for the stories of--H.G. Wells, Keith Laumer, Gardner Fox, Edmond Hamilton, Roy Thomas and Robert A. Heinlein"
Robins lettering per Nick Caputo; previous indexer credited Steve Ditko.
Letters of comment from Scott J. Lovine, Scott Gibson, Jeff Sporn and Ray Hamel.