Fantasia - Musicana: The Fantasia Sequel That Never Was 

It's a shame this couldn't have been made, especially when Disney also cancelled "Fantasia 2006". When you look back at what could've been; Musicana and Fantasia 2006 together actually seem pretty similar. Each was gonna feature music from around the world, but had sadly faced rejection in fear of failing, yet again. And you know what's crazy? Fantasia 2006 was actually pretty far in production with four segments already completed. Like, wow! After Disney cancelled the project those animations were turned into standalone shorts. I wonder what it would've been like?