We have the first teaser for The Flash from the online event DC Fandome . According to the teaser, we see two versions of the hero and Supergirl recruiting who appears to be Keaton's Batman.
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Therefore, the Flash solo film will adapt Flashpoint , an iconic comic book arc in which the hero messes with the timeline by trying to go back in time and prevent his mother's murder. It's possible the film will show an older, bitter, and violent Batman.
Finally, The Flash arrives in theaters on November 4, 2022 .