Who is the rogue Jedi who is responsible for the nano-droid bombing of the Temple and presumably for the framing of Ahsoka Tano?
Based on the events of Season Five Episode 19, To Catch A Jedi, I think we can safely eliminate Sora Bulq, because the bad guy who got the jump on Asajj and then Ahsoka is clearly of the female persuasion.
Now clearly Dave and crew want the viewer to suspect Barriss Offee as the culprit. We see Barriss alone in her quarters wearing dark clothing and talking to Ahsoka via comlink. Later in the episode it is Barriss who gives Ahsoka the lead to the munitions factory where she is confronted by the masked assailant and captured by the Clone/Jedi task force.
As an Expanded Universe fan, and a big fan of the MedStar Duology that stars Barriss Offee, I would have a lot of storytelling problems with how they are handling Offee's character if they make her the villain. I would also have some reservations because Barriss is one of very few friends that Ahsoka has in her peer group.
The good news is that while we see Barriss in what appears to be dark clothing, the outfit appears to be different than the attacker.
In terms of how the character's body looks it seems close enough that it could be Barriss, but the outfits are clearly different gone is the skirt that Barriss wears and in is a catsuit with different textures than the rest of Barriss' usual outfit. I think we are getting some misdirection here.
For the life of me I can't figure out is who the character might be if it is not Barriss. It seems odd that we would have a completely new character that would set out to frame Ahsoka. One possibility is a return of Aurra Sing, but this would mean that Dave Filoni and crew are giving Sing back EU Force abilities that they prevented her from displaying earlier in the series.
This is setting up to be one great season finale. I guess the real killer will be unmasked next week.
"Among those in attendance of the Jedi funeral are Mas Amedda, Palpatine, Mace Windu, Obi-Wan Kenobi, Anakin Skywalker, Ahsoka Tano, Barriss Offee, Ki-Adi-Mundi, Plo Koon, Yoda, Eeth Koth, Admiral Tarkin, Admiral Coburn, Admiral Yularen, Kit Fisto, Saesee Tiin, Shaak Ti, Tera Sinube, Bail Organa, Mon Mothma, Eekar Oki, and a Weequay Jedi."