What would you think about the candidates not becoming replacements? I'm sure it's happened before since the 1800's or since MIB and Jacob wanted replacements. Were there candidates on the black rock that did not become replacements. If Jacob is really dead, shouldn't someone have already replaced him? Or does MIB have to leave or die to have the person(s) replace him, Jacob, or both? What if none of the candidates become chosen and jacob and MIB's search for a replacement continue. Of course the all knowing Jacob would already know this. Is there anything Jacob doesn't know? Would widmore now be considered a candidate since we know he wants to posess the island?