How is this set in the Snyderverse if Michael Keaton is Batman?
Ummm... the cast list says: "Michael Keaton as Bruce Wayne / Batman: A wealthy socialite in Gotham City who moonlights as a crimefighting vigilante."
Last time I checked, Keaton's Batman is the BURTONverse,NOT the Snyderverse. If it was set in the "DCEU", then Ben Affleck would be Batman.
The only possible explanation is that Keaton is somehow playing Affleck's version of Batman, which would make no sense and be weird.