The last survivor of the doomed planet Krypton, raised in the quiet heartland of Smallville, Kansas, Superman is as much a legend as he is a man. Faster than a speeding bullet, more powerful than a locomotive… The Man of Steel fights a never-ending battle for truth, justice, and the American way. 

For this role base your audition off of the portrayal of Superman from The DCAU Superman Animated Series

Voice Reference: https://www.youtube.com/watch?v=QGMOnbZPkYY