MTV GEEK has a new preview clip from this Friday nights Clone Wars Episode, "Altar of Mortis."
This is the much hyped episode featuring "Dark" Ahsoka. Not only does it appear that Ahsoka is under the sway of the Dark Side incarnate in the form of the "Son," but there appears to be a confrontation in either this episode or next between Ahsoka vs. Anakin and Obi-Wan.