Suicide Squad: 30 Easter Eggs & References You Must See

It's extremely difficult to spot in the movie itself, but hArley's baseball bat has an inscription in homage to her first appearance on Batman: The Animated Series (which was planned to be her only appearance, incidentally).

It's a variation of this classic line:

"Here's to Gotham's Commissioner G., you lock up the weirdos, the crooks, and the geeks. You're a hero to all the boys in blue, but this time, baby, the joke's on you." (With the "baby" replaced with a "puddin").

Here's the proof.

When she's tooling up at the base, she also briefly wields her iconic mallet, complete with smiley face too. Sadly that doesn't come too far with her.