Batman has long been DC Comics' most popular superhero, and as a result, he's headlined in more spin-off comic titles than any other character DC has ever produced. His popularity has prompted many writers to speculate about the Dark Knight's future and possible incarnations. While it's a sound concept for a story, at one point this resulted in six possible Batmen cluttering up DC's possible futures. While they didn't all coexist in the same moment, it still became one of the strangest quandaries for prolific DC readers to navigate.
Source：https://www.cbr.com/six-versions-future-batman-dc-comics/
