Why The Riddler's Cards In The Batman Mean More Than You Think

It becomes a recurring motif throughout "The Batman" that Riddler leaves a card behind for the titular vigilante at each crime scene. The cards hold significance to the plot by typically containing a riddle for Batman to solve, but the cards themselves make for fun Easter eggs all on their own for eagle-eyed fans.

Each card connects to a different Batman villain. Perhaps the best-known example of this is with the first card containing an owl featured in "The Batman" trailer. Many fans quickly pointed out the connection to the Court of Owls storyline, with many believing the arc could factor into the sequel's plot. It's unknown if that will be the case, but it nonetheless makes for a fun addition. Similar Easter eggs can be found with the remaining four cards, as each one connects with a different Batman villain. 

The second card contains an image of a mad scientist who bears a striking resemblance to Hugo Strange. The third card features a picture of a woman dressed in green, which immediately makes one think of Poison Ivy. The fourth card is where things get tricky. It's just a black background with two large eyes looking toward the viewer. It's reminiscent of the Cheshire Cat in "Alice in Wonderland," and of course, Batman has a villain who goes by the name of Mad Hatter.

Last but not least, the fifth and final card has a boy with a puppet. Fans of "Batman: The Animated Series" will likely recall The Ventriloquist and Scarface, a man and puppet duo who commit various crimes in Gotham. Any of these villains would make fun additions to "The Batman" mythos, but for now, they're relegated to references.