"The Batcave is even better than we remembered it, it's awesome," star Will Arnett explained. "But I also love getting into the ho-hum day-to-day of being Batman and what it's like to fight crime each day. Like the idea of Batman oversleeping his alarm clock makes me laugh. It really does humanize him."
Arnett first voiced LEGO Batman -- a memorably comedic take on the iconic DC Comics hero -- in "The LEGO Movie."