First and Last scenes of 6th season (a speculation)
just as in season 3 final episode when we find out we are watching a flash forward…
The first scene of season 6 shows Jack receiving the vodka bottles on flight 815, there is turbulence, the camera pulls back and goes careening to the bottom of the ocean where we see the island, sunk, destroyed, never to bother anyone ever again.
Following the commercial break we get into the season proper with the flash sideways that have annoyed many fans as being a useless contrivance. The assumption made is that the pre-title sequence is part of the same flash sideways as the rest of the episode.
WHAT IF – we have been given a glimpse of a scene from the season finale?
Just as season 5 had the Pierre Chang-Daniel Faraday intro in 1977 and then returns to the same event later in the season, this opener could be a third and more satisfying alternate reality. One that is desirable to neither MIB, Jacob or Widmore but could be fulfilling to all the 815s, Freighties and assorted castaways and innocent bystanders?
Perhaps some series of actions and decisions on the part of the candidates can orchestrate a new reality in which all the pain and sacrifice can be wiped away, leaving an awareness of all that has come to be. Jacob said it only ends once, the rest is progress.