I posted a video ( • The Flash in Batman Re... ) a few years back about a Flash cameo in Batman Returns. Here's my interpretation of the scene from Flashpoint. Considering I had a conversation about this with a certain writer and said how I would handle the scene.
Michael Keaton and Michelle Pfeiffer return but will be de-aged via CGI for this scene. Ezra Miller (Flash) has to find Bruce Wayne and accidentally travels to the Multiverse and into Michael Keaton's Batman Universe. While there, he hears that Bruce Wayne will be at a masquerade ball so he decides to dress for the occasion as Mercury or a nod to Jay Garrick.
This is simply my thoughts about this scene and how I would approach these cameos.
Stay awesome!
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