MIB isn't UnLocke but UnLocke obviously is the Smoke so the Smoke isn't MIB so MIB is now Fayid by sprovo

After reading Cerberus = THREE headed monster by CruzaderJC I came to the idea that we've already seen the three heads but just aren't realizing it yet.

Could MIB be using the Smoke (who wants to go home) as his ultimate puppet to kill Jacob?

I think the pirates came to the island and killed MIB which put Jacob in control.

MIB's loophole was using the Smoke to kill Jacob.

Now that Jacob is dead MIB can be resurrected with the body of Sayid.

The battle is between Fayid(MIB) and Flocke(Smoke) for control of the island.

Jacob is gone until the loop starts over at which time he'll try to make more progress before the end.