It does sound a little desperate for the backers to be interpreting the "one of" as to possibly include others. I'm not really sure whether this is supposed to be an evolution of 2.6.3 or an offshoot of it. If I was feeling particularly pessimistic it sounds to me like there will be one moon you can land on and fly into "orbit" it does specifically mention flying into the atmosphere so I would be surprised if they couldn't do that. But it doesn't mention other locations at all so perhaps you won't be able to warp to other locations/planets. Or perhaps it might be accurate to say you can warp between locations orbiting that one moon. If there were multiple moons, even ones you can't land on, they would have mentioned that, surely?
At this point, with multiple delays and a growing impatience from the community it seems to me every bit of wording, statements and announcements is put under great scrutiny immediately. Not undeservedly, though - it's a situation they've put themselves in by overpromising and underdelivering. I'm hoping 3.0 will be an entertaining slice of the cake but remain pessimistic.