Nothing lasts forever, even Disney. Now they can keep running strong for a long time if they choose. Or they can choose to maximize short-term profits so the current CEO can cash out at max value
. The most likely ways it falls from the pedestal are: 1) Lose identity/corporate culture 2) Over-leverage ahead of a big recession 3) Out pace the market with price increases/decline in services and allow competitors to steal away market share. Now I am sure there are others ways Disney Parks could loose their top spot, but these seem the most likely to me.