I'm suspecting the Riddler has developed a love for Doodle or Die. He's changed his costume to reflect his newfound love.
A man asking "who are riddler" Leaving a riddle. What's green and goes boom?
Bruce wayne ponders the true identity of The Riddler while he carries a bag of trash out to the garbage
A man with jaundice contemplates how many riddles can be in one trash can...
a trash can questioning life
Hamlet in the trash can.
A skull is on it's way to the trash
Exploding skull next to a well filled bucket, wonk.
undeads head trying to jump into a bucket of water
Doodle or Die is the game of "telephone" with drawing!