After the Flash of Earth-One journeyed to Earth-Prime when he met DC Comics editor Julius Schwartz, the hero set into motion future encounters with the staff of this comic book company. Inexplicably, while driving to a school reunion writer Cary Bates encountered a fog bank that was a dimensional bridge from Earth-Prime to Earth-One, wherein he arrived in Central City in time to see the Flash battling his foe the Trickster. It was thanks to Bate's creative mind which exerted some energy on other parallel planets that tipped off the Flash towards how to defeat the Trickster. After this encounter, Cary drove off back through the same fog bank leading him home to Earth-Prime.
This encounter convinced Bates that further adventures were to be had by crossing the dimensional divide once more, this time using the Cosmic Treadmill that the Flash left behind in Julius Schwartz's editorial office. However, this time he traveled to Earth-Two, and was immediately coerced by the Wizard into aiding his latest incarnation of the Injustice Society into defeating the Justice Society. Meanwhile, Cary's fellow writer Elliot S. Maggin used the Cosmic Treadmill to follow his workmate, only he ended up on Earth-One and enlisted the services of the Flash and the Justice League in tracking down Bates. This led to a conflict between the two teams, orchestrated by a now supervillain Cary Bates, that was finally resolved when Maggin distracted Bates long enough to allow both heroic teams defeating the Injustice Society. At this point, the two writers returned to Earth-Prime. A similar battle, involved Earth-Prime's Ultraa mistakenly aiding the Injustice Gang on Earth-One in defeating the Justice League, ended when Ultraa was neutralized in the conflict.
In the future, it would be Ultraa, supervillains from a fourth Earth, and a Crisis that would return Earth-Prime to prominence time and time again in the years that followed.