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.

While the new DCU is launching with Superman, the franchise doesn't have a Batman, and the studio's heads weigh in on a possible choice close to home.