Comics fans are understandably excited that Michael Keaton is returning as Batman in the upcoming DCEU Flash movie, but the concept likely wouldn't have happened had it not been for a single Flash comic that came out in the height of the Silver Age.
The alternate reality adventures of the upcoming film, as well as seminal stories like Crisis on Infinite Earths would not be possible without this issue.It marked a major milestone for DC Comics with a groundbreaking story that has had ripple
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