According to One Take News if you are expecting to sit through the end credits for a post credit scene (as has been typical on previous superhero films), then you might be surprised:

One Take News has learned that The Batman will NOT have any post credit scenes at the end of the film. However, that doesn’t mean you should leave the theatre when it’s done. We’ve heard while there isn’t a credit scene, there is something that you might want to stick around for. We don’t know what it is specifically, but we’ve heard it’s something along the lines of a small easter egg for the fans.

I must say, hearing the film doesn’t have any credit scenes definitely caught me off guard. With all the rumors of who is in the movie and all the surprises planned, I expected one credit scene but honestly, I’m more than fine with no credit scene. We already know that the main stars are signed on for a trilogy so having a sequel be set up in a credit scene seems unnecessary.

Thanks WarnerBrosAU for pic