Though we've already posted the episode preview with video, the main site has also posted the preview version of the episode guide for "Legacy of Terror" (S2 Ep. 7) with the following synopsis:
"When Luminara goes missing, Obi-Wan and Ki-Adi-Mundi lead a platoon of clones in search of her. When the search leads to a mysterious lair, the Jedi are faced with a horde of undead warriors. "
We'll be sure to update when the full version goes online.