The Batman

Robert Pattinson revealed while auditioning for the role, he sneakily took a selfie in the batsuit as a memento "just in case it didn't work out."

Neither Batman nor the police thought to try and find where the incriminating photos from outside the club had been taken, despite the angles clearly showing that they were taken from an elevated position which Riddler would have had to have special access to, as opposed to being taken from the street which any passerby would have done.

After the credits finish, a final message from Riddler appears through a computer terminal screen that says "GOOD BYE ?" followed by a quick flash of Riddler's URL that is featured in the movie.

Edited into The Batman: Deleted Arkham Scene (2022)