I realize it's based on a series of children's books, but I'm skeptical of any film with such a long name: "Legends of the Guardians: The Owls of Ga'Hoole" (especially when it's the first installment of an untested movie franchise).
In this case, Elliot has managed to whittle down an eight-word title to a far-more-managable phrase. When he sees the poster, he just says, "Hoo Hoo."
Are you listening, Hollywood? There's your title.