[KingPriest2]

EW: The whole idea of flash-sideways and the plan to use season 6 to show us a world where Oceanic 815 never crashed — how long has that been in the works? Why did you want to do it?
DAMON LINDELOF: It’s been in play for at least a couple of years. We knew that the ending of the time travel season was going to be an attempt to reboot. And as a result, we [knew] the audience was going to come out of the “do-over moment” thinking we were either going start over or just say it didn’t work and continue on. [We thought] wouldn’t it be great if we did both? That was the origin of the story.
CARLTON CUSE: We thought just doing one [of those options] would inherently not be satisfying. Since the very beginning of the show, characters started crossing through each other’s stories. Part of our desire [in season 6] is to show that there’s still this kind of weave, that these characters still would have impacted each other’s lives even without the event of crashing on the Island. Obviously, the big question of the season is going to be: How do these [two timelines] reconcile? However, for the fans who have not watched the show closely, that’s an intact narrative. You can just watch the flash sideways — they stand alone all by themselves. For the fans who are more deeply embedded in the show, you can watch those flash sideways, compare them to what transpired in the flashbacks and go, “Oh, that’s an interesting difference.”
LINDELOF: Right out of the gate, in the first five minutes of the premiere, you get hit over the head with two things that you’re not expecting. The first is that Desmond is on the plane. The second thing that we do is we drop out of the plane and we go below the water and we see that the Island is submerged. What we’re trying to do there is basically say to you, “God bless the survivors of Oceanic 815, because they’re so self-centered, they thought the only effect [of detonating the bomb] was going to be that their plane never crashes.” But they don’t stop to think, “If we do this in 1977, what else is going to affected by this?” So that their entire lives can be changed radically. In fact, it would appear that they’ve sunken the Island. That’s our way of saying, “Keep your eyes peeled for the differences that you’re not expecting.” Some of these characters were still in Australia, but some weren’t. Shannon’s not there. Boone actually says that he tried to get her back. There are all sorts of other people that we don’t see. Where’s Libby? Where’s Ana Lucia? Where’s Eko? These are all the things that you’re supposed to be thinking about. When our characters posited the “What if?” scenario, they neglected to think about what the other effects of potentially changing time might be and we’re embracing those things.