Unfortunately, the conclusion of the alternate storyline won't be as easy to obtain.
A new "Ultimate Sith Edition" of the game will be released this holiday season, and will include an exclusive Hoth stage on disc, in addition to all of the previous DLC.
"The Secret Apprentice is sent to the planet Hoth on a crusade to crush the Rebellion once and for all," says LucasArts of the level. "While on Hoth, players face Luke Skywalker himself while visiting iconic locations seen in Star Wars: Episode V The Empire Strikes Back."
Pretty cool, but the price is going to have to drop on the content if they expect the people that have beat the game to bite. Still haven't gotten the Jedi Temple DLC for this reason.