I guess it depends if the areas they were working on that we know about are the ones that will end up in Destiny 2 or if all of that has been scrapped in favor of something else. We know there was work done on a new explorable area of Mars that would include a Raid, that work was done on Europa, the European Deadzone, Old Chicago (not sure if this one got very far though), and another Vex related content update code named Vex Void, which could possibly be on Mercury. We now know that Destiny 2 will be more than just an expansion but a complete rework of how a bunch of stuff works in the game including towns and outposts in what they are calling "play in" spaces, so it could be all this was junked, but it's the only leads we have on new areas so far.