Being that it's completely financed by Lucasfilm I doubt the networks are too worried about losing money. It's basically a free show for them to air in whatever time slot they can fit it into. They don't have to hire anyone, pay anyone...they just wait for LFL to send them the prints.

And as much as the PT is loathed around here and other fanboy sites... they still made a ton of money and they'll drum up enough interest just out of plain curiosity. Add in DVD sales and the networks will work out fine on the money end.

The shows will air somewhere.