I know the lightside ending is official cannon, so I'm assuming the TFU2 will follow that. And from what I've read, it seems like Starkiller didn't actually die. Seems kind of cheap, but whatever.

The darkside ending, and all the expansions, were all 'what if' scenarios. None of them are official cannon, as we know from Episode 4. But it does make things kind of fun, and it's something a little different for the player to experience.
So yeah, that's my take on it.
