In fact, there’s already an example of this in the DCU. Batman appearing in Creature Commandos is exactly this. They don’t know who is playing Batman yet, nor what the specific story of his film will be, but they know they are going to make a Batman film. Batman is out there. So that’s why that got a tease.

James Gunn is working hard to revamp the DC Universe after becoming CEO of DC Studios. It's a difficult task after the DCU's hit-and-miss success since its launch, which has left it miles behind the Marvel Cinematic Universe. However, in Batman and Superman, the DCU has two of the most popular characters in cinematic history.

James Gunn recently took to his social media to share a first look image at the upcoming DC Universe project. Kyle Chandler and Aaron Pierre are DC’s latest dynamic duo in the upcoming HBO Lanterns series.