Disneyland has done interim shows in the past as well.But, we got Jungle Book because of ROL Problems. Is Epcot having problems too? Granted not the same thing as we had a date for ROL and no date for this.
It wouldn’t surprise me. Much of the ROE infrastructure may need refurbishment work. The MaxiBarges for example have been running for 30 years. If they are planning on being used for the new show I could see some significant work being necessary.
Maybe an interim show that relies on the specialty tag barges while the rest are refurbed and refitted.