The reaction from movie reviewers was mixed with many panning the movie as coping older Disney movies like The Lion King and the 20th Century Fox movie Ice Age ( although Brother Bear began production before Ice Age did ) , while others defended the movie as a different and resonable variation of the theme . The reaction from film reviewers was mixed with many panning the film as a retread of older Disney films like The Lion King and the 20th Century Fox film Ice Age ( although Brother Bear began production before Ice Age did ) , while others defended the film as a legitimate variation of the theme .