I like the package film/shorts compilation idea, it would lend itself to a creative show easily and wouldn't be a retread of what's been done before.
Just a matter of picking the right segments. Maybe we could tie in Fun and Fancy Free by having Jiminy Cricket narrate it?
Off the top of my head, sequences that might lend themselves well:
Fantasia - Sorcerer's Apprentice, Dance of the Hours, Night on Bald Mountain
Saludos Amigios - Aquarela Do Brasil
The Three Caballeros - Os Quindins de Yayá, the title song
Make Mine Music - All the Cats Join In, Casey at the Bat, After You're Gone
Melody Time - Bumble Boogie, Blame it on the Samba, Pecos Bill
Ichabod and Mr. Toad - The Headless Horseman song
Winnie the Pooh - The Blustery Day song, Heffalumps and Woozles
Shorts - The Brave Engineer, Melody, Toot Whistle Plunk & Boom, A Symposium on Popular Songs