And it was! But because Club Penguin was lacking, they had to introduce it to CP eventually. Over the years, Spike Hike has sent sneak peaks of PSS. From what I see, it is going to be a new 3D concept of Club Penguin.
On Disney Mix, Spike Hike confirned that the beta should be available to see the beta around October. This takes me back to when Megg said "September will be a good month". Riyita, a famous author of Club Penguin Space, says that he feels they pushing it further back (which may be true). Spike Hike has confirmed the beta will be available for mobile users, definitely, but says that it's most likely it will be released for desktop users too. I think that it should be released on the desktop as well, because there are many users on the computer and few who play on mobile.
Who knows what the story will be? Stay tuned for more details as it comes!