Zack Snyder has served as the biggest creative force in the architecture of the DCEU. This fact is something that Justice League star Ezra Miller confirms in the book Justice League: The Official Collector’s Edition.
Miller confessed, "Zack Snyder is the DC god. He’s the father of our universe. He’s been directing this series of films that will really plant the seeds for the whole Gaia tree of the DC Universe, and its many branches and flowers, giving us, the cast, this template as an artistic community. Zack has really taken care of us all. He’s been so incredibly attentive to all of us and our diva needs and our questions. And when I want to overthink the physics of The Flash, he’s been ready to engage with me on that level.”