Your information too is out of date.
The fat lady hasn't sung yet.
I just found an article just after you mention it still being on. I think Aglialoro realized he shot himself in the foot by saying there wasn’t going to be another one. After hearing that, I would have not seen it. I am sure others wouldn’t too. He had to backtrack I think so at least make a little more money.
In reality, I think the other parts will not be made because there isn’t money to do so. Even if they are made, the cast is going to be different.
The ideal way to shoot multipart pictures is to do it all in one shot with the same cast. Unfortunately, it takes a lot of money to do it this way.
http://www.altfg.com/blog/movie/atlas-shrugged-sequels-ayn-rand-john-aglialoro/