What's Locked on the sub?
I think that we are seeing the biggest con of all besides mirroring Sawyers 'Re-con' to take the sub by conning both Flocke and Widmore. JACOB's recon to Man in Black finding the loophole the first con. The Ideas that good and evil play a part in side each person or influence each person whereby good and evil can act independently from one another.
I believe that JACOBs dead body is locked in the sub. We get a direct reference that "there are two Lock(e)s'' on the door not only refers to the two John Lockes but also suggests that a there could be two of someone else. JACOB instructed Widmore to bring back his dead body back to the island.
This could have happened in two different ways:
1--
Perhaps JACOB from the past (in TImeline A) traveled to the real world and was killed by Widmore (as instructed by JACOB himself) and brought back to be reunited with his essence /soul / spirit. in future timeline A.
2--(this one is way out there)
JACOB (JACOBS body) from the B timeline is off the island and travelled back , via Christians coffin , and snatched from the plane by his spirit once close enough to the island. WE see from his body's POV return to the foot of the statue to where he was killed. Because his sprirt or existance is omnipresent it may be able to be resurrected or reunited with his physical being between universes or to any universe that his spirit exists without matter.
It's all part of Jacobs 're-con to the Man in Black.
