Re National Geographic and the film:
Judging by the Africa film it seems that she hires a production company and makes the film out of her own pocket. The BBC would not have paid much for the last one (BBC 4 is notorious for paying peanuts). She has plenty of rich friends so will probably be able to fund the Australia film with their help. The TCT film-making model is basically "vanity film-making". Would National Geographic really turn down a well made film offered to them practically for free? All the controversy surrounding her will probably make it an even more attractive proposition for them.