I think everyone needs to calm down. The fact that they are working off of the "true Sith" mystery that has captivated for four years is proof enough that The Sith Lords is factoring into all of this (and don't start with the but-they-were-mentioned-in-the-first-game argument. That was clearly a throw-away term describing something entirely different which BioWare had no intentions of exploring). This major plot device from TSL has become the backbone of The Old Republic's story. Even if they ignore everything else from the game, they wouldn't be disregarding it completely, just not referencing it (much).
Don't worry! I have no doubt that TSL's story will still fit within continuity, even if hardly anything from the game is referenced. It's the same with the movies themselves: you can watch Attack of the Clones and go right into Revenge of the Sith without ever exposing yourself to any of the Clone Wars media, but all of that stuff still fits (well, until this new cartoon show started messing everything up, but Leeland Chee has said that it'll all be fixed eventually. I have a feeling that ensuring that TSL still fits is a top priority for him as well).
Originally Posted by a silly noob
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İ CAN WAİTİNG KOTF PART 1 RELEASED 5 YEAR AND İTS 1 MAN ( OSMAN GUNYAZ DEVELOPERS ) BUT YOURS VERY PEOPLE İ CANT WAİTİNG 5 YEARS