Those viewers will, therefore, likely be curious to hear The Batman director and Penguin executive producer Matt Reeves’ long-awaited explanation for the Dark Knight’s absence from the HBO series. In an interview with Digital Spy,

But one complete scene stood out to me in the finale as a deliberate set up for where we might see Oz in The Batman: Part 2. Almost as if Matt Reeves asked LeFranc to include this one sequence, just to lay the groundwork for a story he’d like to explore down the line.

The comic that arguably has the most influence on The Penguin is Batman: Dark Victory by Jeph Loeb and Tim Sale, which serves as a direct sequel to Batman: The Long Halloween. In Batman: Dark Victory,

If Sunday night's finale of "The Penguin" is a further indication of how the world created by Matt Reeves is going to be moving forward, then Batman is in very good hands. The Colin Farrell-led series ended with a bang,

HBO’s The Penguin only exists because The Batman was wildly successful and audiences really gravitated to Colin Farrell’s against-type rendition of Oswald Cobblepot, or Oz Cobb as he’s known in this universe.

One eagle-eyed fan has pointed out what looks to be either a massive Batman Easter egg or ominous foreshadowing for a potential second season of The Penguin. In The Penguin episode 4, there's a brief,

The Penguin has ended its run on HBO in spectacular fashion, leaving us all wondering what’s next in the criminal careers of Oz Cobb and Sofia Falcone. But one question remains for fans of The Batman spin-off series—where was the Dark Knight?