Mark your calendars as The Clone Wars Season 4 Blu-ray / DVD release date has been announced for October 23, 2012.
All 22 episodes will be released on Blu-ray in 1080p high definition (2.35:1 widescreen), in 5.1 DTS-HD audio. The DVD will feature an anamorphic transfer with 5.1 Dolby Digital audio with tons of extra features. Head to IGN for more info.
UPDATE: IGN has removed the info. But you can see the details after the link.
Executive Producer George Lucas and Lucasfilm Animation present Star Wars: The Clone Wars The Complete Season Four. The battle to save the galaxy reaches new heights of peril and new depths of darkness. The valiant Jedi Knights and clone troopers defend exotic planets from enemy forces. They wage war underwater, battle across a night-shrouded world, and take on the merciless Death Watch. Our heroes are tested like never before as Anakin is haunted by the realities of his past, Ahsoka fights to free her people and an undercover Obi-Wan braves a deadly bounty hunter tournament. Season Four culminates with the shocking return of a villain from the past: the ruthless Darth Maul, who will stop at nothing to achieve vengeance. The epic action, timeless characters, and sense-shattering sights and sounds of Star Wars surge on in Star Wars: The Clone Wars The Complete Season Four.
22 Adventure-Packed Episodes
5 Video Commentaries
Exclusive to Blu-ray for a Limited Time: Jedi Temple Archives: Extensive Database of Early Test Animations, Concept Art & 3-D Turnarounds