No tenía ni idea, pero viendo el enlace que pones dice:
The Great War was a war between the Sith Empire and the Galactic Republic between 3,756 BBY and 3,656 BBY.
It heralded the return of the ancient Sith, remnants of the Empire from the Great Hyperspace War who sought revenge for their humiliating defeat at the hands of the Jedi and the Republic. The Sith's invasion caught the Republic by surprise. The Sith seized many worlds in the Outer Rim Territories, destroyed the shipyards at Sluis Van, and cut-off the Rimma Trade Route.
The war came to an end with the Sacking of Coruscant and the signing of the Treaty of Coruscant.
By the end of the war, thousands of Jedi were dead. The surviving Jedi would eventually re-settle on Tython. The end of the Great War set the stage for a cold war between the Sith Empire and the Galactic Republic in the years that followed.
Así que no se lo han sacado de la manga, sino que está ahí de las novelas/comics, lo cual me mola y si lo hace Bioware mucho más.
Un gran juego sin duda... lo espero con ansia!