Walt Disney has unleashed the full-length trailer for the musical Into the Woods [INTWD]. The second trailer no longer hides the fact that the adaptation of the Stephen Sondheim stage musical features singing numbers. The story follows a baker and his wife as they interact with Cinderella, Little Red Riding Hood, Rapunzel, the Big Bad Wolf and other characters based on various Brothers Grimm fairy tales. Directed by Rob Marshall [RMARS], Into the Woods opens in theaters on December 25th.