Lion King, Aladdin, Beauty and the Beast.
DS is 3 1/2 and he loves them. He is also obsessed with Nemo, but you will get more "mileage" out of these movies ------- AK's parade and show are Lion King, the Aladdin carpet rides in MK, and the Belle stage show in MGM>
Also, if he does not already watch Playhouse Disney, show him Bear in the Big Blue House, Stanley and Roli Poli Olie for the show in MGM.