Air gives a good idea of how badly Nike were doing before the Air Jordan. With Disney, they're in a much better position compared to the 1970s and 1980s when they were in a bit of a rut of how to proceed and it took Michael Eisner and Jeffrey Katzenberg to turn it around. Eisner while his tenure ended badly did some smart moves such as going into television, creating divisions for more adult oriented films and making moves into areas such as theatre which proved fruitful.
20th Century will likely pay off long term. Things like The Simpsons and Family Guy will be generating revenue even if they stopped making new episodes as well.