Rumor StatusBlue Sky
With changes and additions expected at Epcot, updates to Spaceship Earth may also be included. Siemens dropped sponsorship of the attraction in 2017 and it is expected that an updated version will take place as part of the larger changes to Epcot.
August 8, 2018: WDWMagic.com user marni1971 is reporting that a 5th version of Spaceship Earth should happen in the "next half decade or so."
August 2, 2017: WDWNT.com is reporting that Siemens has abandoned the corporate lounge inside Spaceship Earth ahead of the conclusion of their contract.
June 29, 2017: BlogMickey.com is reporting that Siemens employees have been notified that their contract with Disney will not be renewed after it expires at the end of 2017. Siemens currently sponsors Spaceship Earth and Illuminations: Reflections of Earth at Epcot. It is unknown what change (if any) this will have on those attractions.