Cool yes. Possible....well let's see...it would mean in essence creating a space-sim game from scratch and incorporating it into Destiny, and while it has kind of worked okay-ish in SWTOR and SW: Galaxies, I'm not sure if it would work in Destiny to be honest. Maybe as a paid expansion later on? Maybe in Destiny 2 in a few years? But for the Space portion of the game to be worthwhile it would have to be a fully-developed and programmed game in it's own right which has been added to an already fully-developed game like Destiny ($500 Million dollars so far or something?) Now the thought of Space-based PvP Combat where the ship you bought acts differently to other ships and where upgraded weapons parts and engines create a unique starship for everyone...potentially it could be very cool. Will it happen? Probably not XD