Who is John Galt?

We may never know, as the producer of Atlas Shrugged is having second thoughts about going ahead and making parts 2 and 3. He blames the critics for dumping all over the film, and while I agree that critical appraisal has been slanted heavily against the messaging of the movie, I find it hard to disagree that from a purely theatrical standpoint Atlas Shrugged Part Uno is kind of a piece of shit. Bummer, though. I'd still pay for my tickets to see it play out.