I think its quite possible that we may be seeing a droid as a playable race. Remeber that Edge article leak about a week ago with all of the characters on the front page? Notice that all the characters shown on the two pages are known player classes in game, except for one. On page one in the upper left hand corner it shows a big green Droid standing there next to the Troopers and BH.

I also think they may be hinting at a new profession, spy. That is what apparently the droid was doing when confronted by the Jedi and was undetected during the first part of the conversation.

Of course in the new cinematic there is a Twi'lek with dual pistols that enters the Jedi temple with the Sith with no real explanation of who she was.