According to DVDActive, Season 1 Volume 2 of Star Wars: The Clone Wars will be available this September. Unlike the previous volume, this DVD includes four episodes somewhat out of order. It sounds like they’re releasing a few of the best episodes and waiting for the DVD/Blu-ray box set to release the entire season in chronological order.
Details from DVDActive:
Warner Home Video has provided us with artwork for The Clone Wars: Clone Commandos which includes 4 more episodes from the animated series (Rookies, Storm over Ryloth, Innocents of Ryloth, Liberty of Ryloth). The disc will be available to own from the 15th September, and should retail at around $19.98. As far as we know, no extra material will be included.