We know that it is possible for the Island’s protector to be replaced. Can “Smokey” be replaced, too? If Jack takes the place of Jacob, who will take the place of Smokey? Assuming that this is possible….do you think Widmore, in his lust for the power of the island will go to the light, separate his soul from his body, and become the new Smokey?
*Update: Nevermind…I just remembered that the island ends up underwater.