Star Wars: The Old Republic "Mysteries of KotOR" Trailer

We can thank this weekend's Penny Arcade Expo for a new "Mysteries of Knights of the Old Republic" trailer that features footage of an attack on Darth Revan's complex while also suggesting that Revan stashed away some "mysterious cargo" within. There's also a brief look at HK-47 at the end:

And here's the quickie description:
The Jedi Civil War left many unanswered questions. In the difficult days following the showdown between Darth Revan and Darth Malak, the Jedi Order struggled to survive, leaving little time for investigations. Redeemed as a Jedi, Revan traveled into deep space in search of a mysterious evil. We now know that the source of this evil was the reconstituted Sith Empire, but that solves only a portion of the mystery.