Here's my list:
Lists of movies everyone needs to see before they go to Disney:
Swiss Family Robinson (with John Mills, father of Hayley) for the Treehouse
Alice in Wonderland (teacups)
Dumbo (obvious)
Peter Pan
Snow White
Pinnochio
any of the Daniel Boone series starring Fess Parker
Tom Sawyer/Huck Finn
Song of the South for Splash Mountain (hard to obtain--out of circulation)
Cinderella
This is odd, but people should see "Hello Dolly" and "Meet Me in St. Louis" and Summer Magic simply because the music from those movies is played on Main Street as background music and really makes you feel, oh, ..I don't know, happy!!!
Also, check out "The Music Man" Also, Lady and the Tramp for Tony's Town Square Restaurant.
The Lion King: There are a number of attractions with Lion King characacters, songs and elements- Festival of the Lion King, Mickey's Jammin' Jungle Parade and Rafiki's Planet Watch at AK, Circle of Life movie at EPCOT, Mickey's Philharmagic and Enchanted Tiki Room at MK, and Fantasmic at MGM. It's also a great into for Animal Kingdom since many of the characters from the movie also have real-life counterparts on the safari or Panganini forest trail.
Peter Pan: The movie has its own ride at MK and also has a segment in Mickey's Philharmagic as well. The characters are also featured in the castle show, afternoon parade and SpectroMagic in MK and Tinker Bell makes a special appearence in the Wishes fireworks flying down from the Castle.
Finding Nemo: At EPCOT, characters from Nemo are featured in The Seas pavillion. They have their own ride and a great interactive show called Turtle Talk with Crush. There's also a live musical version of the film at AK.
Cinderella: Brush up on the story behind the princess who lives in the castle at MK. She's also in both MK parades and the castle show.
Toy Story: Buzz Lightyear has his own ride at MK, there is a Pizza Planet restaurant and arcade at MGM based on the one in the movie, character meet-and-greets at Al's Toy Barn, and they appear in the parade at MGM. Soon there will be a Pixar street dedicated to characters.
Pirates of the Caribbean: The ride that the movie is based on is at MK plus some of the new characters like Captain Jack, Barbossa, and Davy Jones are now on the ride as well.
Beauty and the Beast: This will help in understanding the live stage show. The characters are also featured in Mickey's Philharmaghic and the afternoon parade at MK and Fantasmic
The Little Mermaid: Also has a show at HS, is featured in Mickey's Philharmagic, and is in a number os shows and parades including the afternoon parade and Spectromagic at MK and Fantasmic.
Fantasia or Fantasia 2000: The Sorcerer's Apprentice staring Mickey Mouse is featured in both of these films and was an inspiration for segments from Fantasmic, Mickey's Philharmagic, the Great Movie Ride and Spectro Magic parade.There's also Fantasia-themed mini golf near the Swan and Dolphin.
Classic Disney Shorts: Not really a movie, but this will help give some background for Mickey, Minnie, Donald, Goofy, Pluto and the rest of the gang who appear in parades, shows, and meet-and-greets throughout the parks. Mickey's Toontown Fair also gets a lot of its inspiration from these shorts. There are a number of DVDs out that showcase them including the Walt Disney Treasures DVDs and Walt Disney Classic Cartoon Favorites volumes.
__________________