Answer
In the 2008 animated film Kung Fu Panda, Ian McShane voiced Tai Lung, the main antagonist. Tai Lung is a snow leopard who was trained by Shifu, the same teacher who trained Po, the panda who becomes the Dragon Warrior. Tai Lung was the one who was originally destined to become the Dragon Warrior, but was denied the title because he was too impatient and arrogant.