According to Disney, “actress Gina Torres will brief you as you prepare for your mission aboard the X-2 Deep Space Shuttle at the International Space Training Center (ISTC).”
Torres is most know for her roles on Hercules: The Legendary Journeys, Serenity, and most recently, Westworld.
The change to the briefing is being triggered by an update to the ride, featuring a new family-friendly Green Mission that will allow children over 40 inches to enjoy the attraction.
Source: Walt Disney World
Tom is the host and producer of the DIS Unplugged: Disneyland Edition podcast, plus Disneyland Editor of The DIS. He enjoys traveling with his wife and teenage son. At this point, their favorite destination is Alaska, with a FIFTH cruise there planned for the Summer of 2019. In his spare time he volunteers with Boy Scouts and Cub Scouts, and help found his son's former Cub Scout Pack. His favorite Disneyland attraction is Space Mountain.