Seven Of Five wrote:
I've thought all season that the side-timeline was an epilogue after the coming fight. It's turned out to be an actual, concurrant alternate reality, but I still think that it will be the one the Losties end up in.
It's by no means certain that the sideways timeline in concurrent with the, er... prime timeline. Remember, Desmond's consciousness has traveled through time as well. I'd bet money that the sideways stuff will in fact be the epilogue.