Initial footage from The Flash trailer hints that Michael Keaton's early '90s Batman faked his death, according to a popular theory. The DC Extended Universe has spent years developing a solo movie for Ezra Miller's Barry Allen. The Flash went through multiple iterations of creative teams, but one of the project's constants has been the idea of it adapting Flashpoint. The iconic comic storyline involves time travel and the multiverse, as Barry Allen tries to prevent his mother's death.
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