Namaste, Folks!
If my theory has been posted in some other way before, I will apologize, but I think we are one collective mind...anyway, here is my theory:
My opinion is, that Jacob´s death is the end of the Jacob we know. No resurrection, because he as a person is dead, gone and fried.
So you think there is only MIB left? Nope...
...because Jacob touched Kate, Sawyer, Hurley, Jack, Jin and Sun. What does this mean and what effect does this have?
Let me explain:
First Question:
Who is Jacob?
Answer:
Someone, a vessel, who´s inhabited by some sort of power (I think he is on the light side)
Second Question:
Why does he touch people, like the 815ers?
Answers:
To lead the way to him. Like a lighthouse.
But also he gives a piece of him (or his energy) to the ones he touches.
Third Question:
Is he/Jacob/vessel dead like Christian?
Answer:
No, he is alive (needs to eat fish) till he gets stabbed. And the light power/energie allows him to jump in time and space.
Fourth question:
But if Jacob is dead and burned, the power/lighthouse effect is gone. Or not?
Answer:
No, because there is a piece of him still in Sun. (Sun is a very fitting name, isn´t it?
Fifth question:
What about Jacob touching Locke?
Answer:
Well Jacob revived Locke the day he fell. He gave him a lot of energy so to speak. Later, on the island, the black smoke took Locke and wanted to drag him into the hole in the ground. The black smoke (Evil force) touched Locke aswell. Since then, a war broke lose inside of Locke. When he saw Jacob/MIb in the cabin, the energy inside him and the energie (light or dark) in the chair came to close. BANG! All hell broke lose. Why didn´t it happened to Hurley? Because he wasn´t touched jet.
But Locke was still alive, leading his life, not knowing that two entities fought a war inside of him. Then he died and the dark energy took his form and conquered him totally, but still the dark energy had seen through Locke´s eyes knowing everything he needs to know about Locke.
But I think that Jacob/light energy (even if his vessel is dead) saw the loophole-plan of the MIB. I think all the pieces are in place for the war to come.
Btw.: If the light energy/Jacob can get killed by fire, the dark energy can get killed by water (just my opinion). So Christian crossed the water to dismiss Michael on the freighter. Christian is one form of Jacob, too.
P.S.: They are coming means that the touched 815ers found some way back to Sun the lighthouse. (Maybe Sun is the one who will save us all)
Thanks for reading! Please, tell me what you think...