“Finish Him” Hidden Message
This easter egg can be done in all versions of the game.
On the Gotham stage while in front of the Empire Theater, if you or your opponent are hit into the sign 3 times the letters on the sign will spell out, “FINISH HIM”.
Finish Him is a well-known term used in the Mortal Kombat video game series which prompts the killing of your defeated enemy. After a major acquisition in 2009, Warner Bros. owns both DC Comics and Mortal Kombat, which has lead to numerous crossovers.