Writer-producer David S. Goyer has a long history with superhero films. From the "Blade" trilogy to the upcoming "Batman v Superman: Dawn of Justice," he's had his hand in many of the genre films fans know and love today. In an interview with The Daily Beast, he called for more diversity in filmmaking, citing upcoming films like "Wonder Woman" and "Black Panther" as progress, but "not enough."

"I think the world would be a better place if more filmmakers were either female or came from more diverse backgrounds, because there are too many white male directors," Goyer explained. "I was on the board of the Writer's Guild and that was a big issue for us, sort of the chicken and the egg thing: How do we add more diverse voices, especially when the audience is so diverse? On the last show I was on, 'Constantine,' I was very happy that close to half of our writing staff was either female or not white. That was something that we tried really hard to do. But females and minorities, they're not represented in terms of the aggregate pot of writers and directors. It's not 50/50 in terms of females. It's a real problem."

"I do [see progress happening]," he added. "Everyone is aware of the problem and wants to amend it... Nicole Perlman worked on 'Guardians of the Galaxy'... Look, at least there's a 'Wonder Woman' movie going into production. There's a 'Black Panther' movie that's coming. At least there's a 'Captain Marvel.' That is some form of progress. It's not enough progress, but it's something."

Goyer's next film, "Batman v Superman: Dawn of Justice," opens on March 25, 2016 and stars Ben Affleck, Henry Cavill and Gal Gadot.