Hier nochmal deutlich 
According to Lucas, whenever a game and/or movie disagrees with the book of said game/movie, the book is always right. In the novel for Force Unleashed II, it is never stated for a fact that the Starkiller that takes place is not a clone. Kota believes he is the original Galen Marek revived by Vader, while Starkiller (who tells Kota not to call him Galen Marek) believes he is a clone. The novel also hints that in the first Force Unleashed, after Marek was betrayed by Vader and tossed into space, he was actually placed in suspended animation to recover, and the character being played for the remainder of the game is in fact a clone, and therefore it was a clone who was killed by Palpatine in the Death Star, while the original Galen Marek recovered on Kamino, and that's who the player controls in the second game.
Oh and I forgot to mention, the book features the Light Side Ending, therefore that is the official canon ending.





