Complex sentence: The theatrical release of the film was preceded by a Looney Tunes short film titled "Daffy's Rhapsody", featuring Daffy Duck and Elmer Fudd in the first CG or 3-D depiction of these specific Looney Tunes characters.
Split into simpler sentences: The theatrical release of the film is preceded by a Looney Tunes short film titled "Daffy's Rhapsody". The short features Daffy Duck and Elmer Fudd in the first CG or 3-D depiction of these specific Looney Tunes characters.