According to ViewerAnon, Batffleck dies in the first act of the film. Speculation: Affleck’s death will be used as the emotional inciting incident that prompts Ezra’s Flash to try & reverse time, with the intention to prevent Affleck Batman from dying but instead of traveling back in time he ends up traveling to a another universe - which is the Burton Batman universe. Which is, of course, where he will meet Keaton’s Batman. Affleck’s Batman dying in the DCEU would be somewhat ironic as his death was planned even in Zack’s plans for JL Part 3. So in a way they would be fulfilling Zack’s intentions after all.