Can you please explain what is ment by hidden power. It sounds like another boring tomb raider story line for the Imperial player, while the Republic story line is about winning the world to the Republic cause much like Corellia and Quesh and Alderaan and it may be a hunch but I think they will defeat the Hutt Cartel in the final battle. The Imperial story line seems to be something that could have been run on any of the worlds and will have them running from place to place looking for some hidden power which will amount to nothing. With all likilhood the republic story will stumble upon near its conclusion.
So can you give us some idea on this hidden power and how epic a story line it will be or if it is just a side quest to the main story of the republic fighting the Hutt Cartel.
They could make it epic and say it's a marooned Pius Dea warship, or a Celestial artifact. Or do it the smark (not a typo) way and says that the Makeb offensive is just to give to the Imperials hope.