According to the Gibson Guitars website:
Over the weekend, the Zappa Family Trust announced that they've quite thoroughly identified all parts and participles of the audio and video recordings of this famous run of shows, and will finally deliver a concert film in theatres, DVD and on Blu-Ray some time before December 2013.
In the meantime, in anticipation of the actual movie, the ZFT will release a prequel to the soundtrack. Or as Gail Zappa describes it, "75 minutes and 49 seconds of Roxy without the Elsewhere."
This features the George Duke/Ruth Underwood/Napoleon Murphy Brock/Fowler BRos. era Mothers -- one great band..
For Zappa fans, this is a long-anticipated development to say the least.
Below is a trailer/teaser released last week:
And below is 32 minutes of a '73 Roxy show. (Watch this quick. I have a feeling it could get taken down before the DVD comes out.)