It got canned.

Cant remember the exact circumstances, but there was a lot of controversy around it...

... Think an arrest warrent was issued for the producer/director after they were alleged to have filmed on land/areas deemed "off limits" etc.

... Then I think the producer/director dissapeared.

... Then I think either the producer or benefactor of the documentary is alleged to have disappeared with the hard drives containing all the footage they shot, and as far as I am aware he/she and the hard drives were never seen again.

You can Google it, and I'm sure that will clear it up, like I said been a while and a bit sketchy on the exact facts, but thats about the gist of it.

The stuff of Conspiracy Therorists wet dreams that one was