It's available to buy from Amazon now.
The highly anticipated sixth and final season of the Emmy Award-winning series Star Wars: The Clone Wars, the 13-episode season dubbed "The Lost Missions." In these eagerly anticipated episodes of Star Wars: The Clone Wars, some of the deepest mysteries of the conflict between the light and the dark sides of the Force are revealed. An intrepid clone trooper discovers a shocking secret, Anakin Skywalker's closest relationship is tested to its limits, and what Master Yoda discovers while investigating the disappearance of a Jedi could forever change the balance of power in the galaxy.
November 11th will see Star Wars: The Clone Wars - The Lost Missions: Season 6 on DVD (3 discs, $39.99 RRP) and Blu-ray Disc (2 discs, $45.99 RRP). Each will run approximately 390 minutes long, and come with bonus material (no details yet)
H/T to uber fan Kenny Kraly Jr for heads up.