That footage of the Hobbit is indeed bogus. It was thrown out as a front to cover the real production.
Having recieved the blessing from Tolkiens family (the thing that was holding up any Hobbit movies), Jerry Bruckheimer yanked the rug out from under Peter Jackson and is filming it right now.
There have been some casting changes from the LOTR series, and also some book revisions to make the story more timely. The film is going to take place in German occupied London in 1944. The movie will star Sam Elliot as cowboy/wizard Merlin and Chris Tucker as Bilbo Baggins. They're keeping it a secret, but it's rumored that David Spade is doing the voice work for the street-wise and smarmy CGI Smaug and Bruce Willis will play Winston Churchill.