I think this might be a great game on its own or as a side game but from what story Destiny has brought to the table has been in a let's say different style. The new maps to the game and ideas that come with it are good but does seem very different as gameplay goes. These actions would also need some of the core game and its gameplay to change allot. Don't get me wrong this would be cool but as an add-on would change allot and from a development standpoint you might as well make it the sequel