When the Torguta companion Ashara Zavros, among some other companions of NPC species, received a graphical update that gave her a full character model, I assumed the Togruta will be one of the next species they make available to players. Well, that was pretty simple to assume even considering how popular that species is (thanks to little Ahsoka). The two other species they've mentioned, I think, will be ones that already exist in the game in form of NPCs (so no Sephi, Arkanians and other near-humans mentioned in this thread). Personally, I think those will be Nautolans and Nikto.