At the 2017 D23 Expo, Disney officially confirmed that a new mission will replace Mission: SPACE Green and Mission: SPACE Orange will be updated to improve the mission to Mars.
The new Green mission will take guests on a tour around the Earth. The teaser below was shown during the presentation:
In addition to the new missions, Disney announced a new space themed restaurant will be built adjacent to Mission: SPACE. Concept art shows large viewing windows that look out into space. The restaurant will be operated by the Patina Group. The Patina Group currently operates Tutto Italia and Via Napoli at Epcot and Morimoto Asia at Disney Springs.