The creator of Batman, Bob Kane, never hesitated to admit how much influence Johnston McCulley's Zorro had on him when he created the Batman. The two have somewhat similar origins and costumes, and Batman even does some swashbuckling with Ra's al Ghul. Batman Beyond continues the parallels between the two characters. Bruce Wayne hangs up the cape and cowl due to old age, just like Diego was about to do in The Mask of Zorro. Both that film and "Rebirth" jump ahead twenty years. Diego trains Alejandro to become Zorro; Bruce trains Terry to become Batman. As Diego is ultimately killed by an old enemy, in Return of the Joker, Bruce is nearly killed by his old foe.