No offense, but why does Tomorrowland have to be space related? At the time it was built, space was new and different, but it is 'old hat' now. Tron fits into Tomorrowland as it is 'futuristic.' ...
If speculation is allowed....I would think that this announcement may have more to do with the 50th anniversary of Magic Kingdom/WDW than anything else. Festivities should begin somewhere in the 4th...