All things being well, Imagineering are set to hand over Mission Space to park operations within the next 2 weeks. This is likely to be the day of the first preview for WDI crews and their families. Following the WDI party, the attractions opening date is then in the hands of park management/operations on when they wish to begin soft openings for the public. Baring any problems, it looks as though Space will be taking guests for a spin as soon as mid-late June 2003.
I would also add that people who have ridden this so far are giving it a major thumbs up. Mission Space has become the number 1 ride for them anywhere, period. You are not going to want to miss this ride!!!
REMEMBER, THIS INFORMATION IS NOT OFFICIALLY RELEASED INFO, AND SHOULD BE TREATED AS SUCH. DO NOT PLAN A VACATION AROUND THIS RUMOR. THE OFFICIAL SOFT OPENING DATE REMAINS AUGUST 15 2003.