Before Man of Steel composer Hans Zimmer finally confirmed in April that he will be providing the score for Batman v Superman: Dawn of Justice, the musician admitted in September 2013 that he was unsure about taking on this job, because he didn't want to create new Batman music after working on Christopher Nolan's The Dark Knight trilogy. During the red carpet premiere of Interstellar, Hans Zimmer revealed he came up with a solution, and has brought in his friend Junkie XL to handle the Batman music.
"You know something? I have agonized over it. I agonized over it, so much so that finally, I went, I don't want to betray what Chris, James Newton Howard and I did. And so I asked Zack [Snyder] if it would be OK if I called a friend in. And I'm going to be working with Junkie XL, who really is a great friend. He just finished the Mad Max: Fury Road score. I said to him, 'You take care of Batman. I'll do the other guy.' And Zack loved that idea. It's a way out."
Junkie XL, a.k.a. Tom Holkenborg, most recently composed scores for Divergent, 300: Rise of an Empire and Paranoia, and he also provided additional music for both Man of Steel and The Dark Knight Rises.
In a separate interview, Hans Zimmer also discusses his approach to Superman.
"I celebrate humanity. My big thing with Man of Steel is that rather than doing this big splashy thing, I was looking for a human element. I thought, why can't I think of this character as someone who has these powers but what he really wants is to be more human. I think the whole thing with Kryptonite is that it's an easy way out -- but that if you really want to destroy Superman, you break his heart."