Barbara Muschietti, the producer of The Flash (and sister and longtime collaborator of the director), told Vanity Fair she had worried this might make him reluctant to return at all. “There have been some all sorts of stories and things he said himself about having a very hard time playing Batman, and it had been difficult for him,” she said. “I think it was more about a difficult time in his life. When we approached him, he’s now in a very different time in his life. He was very open to it, which was a bit of a surprise to us. It was a question mark.”
“We are all human and go through great times in our lives and terrible times in our lives,” she added. “Right now he’s in a place where he can actually enjoy being Batman.” Plus, he doesn't have to carry the entire movie. “It's a pivotal role, but at the same time it’s a fun part,” she said.