In a March 2020 interview with Collider, Michael Giacchino said he "felt total freedom" to do whatever he wanted.
"Matt always agreed, this is our Batman, this is our vision," he explained. "In the same way that I always loved, what I still do about Batman comics and graphic novels is that each of these artists, each of these authors they take their own crack at what they want this to be. It’s their version of Batman. I love it when I see a graphic novel of Batman in the 1800s. To me that is cool. I love that. I’m not the kind of person that says, 'Batman must always be this.' It’s like, 'No, why? It can be whatever the artist wants to be and it has over the years done that, many times over.' I love the idea of taking something and just kind of doing our version of it."
Listen to The Batman below: