No, HK-51 was the cut HK model. HK-50s exist in KotOR II, and it is hinted that a factory exists, and it is on Telos, however the mission was never finished and so you never do anything more then destroy a bunch of HK-50s and talk to HK-47 about the existence of a factory. HK-47 and G0-T0 were supposed to decide the fate of Malachor. (Basically you choose whether HK-47 uses HK-51s to pwn G0-T0 or G0-T0 pwns HK-47. That decision had a light/dark outcome, either allowing Malachor to stay as it is, or destroying the planet again by using the Mass Shadow Generator. Not sure which one was which though. =P) I know almost everything there is to know about KotOR II's unreleased content. The stuff actually inside the game's disc, anyway. Little fuzzy on some of the details though, it's been a long time.

This game seems pretty awesome, as a huge Star Wars fan, and the son of an even bigger Star Wars fan, I know a lot about the really amazing Star Wars game. The one thing that always bothered me to death was Knights of the Old Republic II: The Sith Lords' massive amount of missing content. If you guys are planning to actually restore some of that content to the lore of this game, then I will most certainly play it. I've heard about a new companion, HK-51. I'm curious as to whether or not you are making it up on your own, or if you're making it up somewhat based around the missing content of the second game. How many others actually know about all the missing content? There's a lot, way more then the first game had. Also I know Obsidian made the second game which is why I would guess that BioWare might not even know about the cut content, but I think they should know and use that as the basis for things related to the second game in this game, if they are actually using lore from the second game.