I think the next animal minion to appear should be Ratbat. He could be based on his IDW Comic incarnation: a Cybertronian Senator in the form of a bat, who assumes Decepticon leadership. Not only can he be an animal, but he can also possibly serve as the next film's antagonist. He could take the mode of a large bat-themed automobile (http://images.wikia.com/batman/image...obile_page.png) or airplane (The Bat - Batman Wiki), some bat-themed vehicle anyway that would fit him. Oh, and he should be voiced by Kevin Conroy. Would you like to see TFilm Ratbat?