At a young age Bruce's parents were shot in a alley, right in front of him, and it was this traumatizing event that shaped Bruce Wayne's transition into the Batman. After it seems he was adopted and raised by Alfred, the family butler. As he grew older he began intense training, sharpening his mind and strengthening his body; however he realizes that that alone isn't enough. He knows he has to become more than just a man, he must become a symbol. Through hardwork and a lot of sacrifice Bruce Wayne becomes the Batman.