Walt Disney Co. DIS, -1.22% has sobering news for investors. It says coronavirus "makes it more challenging for management to estimate future performance of our businesses, particularly over the near to medium term." Shares of the Magic Kingdom have tumbled 35% this year as the company tries to assess the damage to its business. "We have closed our theme parks; suspended our cruises and theatrical shows; delayed theatrical distribution of films both domestically and internationally; and experienced supply chain disruption and ad sales impacts," the company said in a Securities and Exchange Commission filing on Thursday. "In addition there has been a disruption in creation and availability of content we rely on for our various distribution paths, including most significantly the cancellation of certain sports events and the shutting down of production of most film and television content."