Here is part of an interview with NY Mag.
The last time we saw Sun in the flash sideways, she was going through customs. The customs agent called Sun by her maiden name, Paik. Jin and Sun aren't married in the flash sideways?
They do have a very different relationship. Let's just put it that way.
That's a very cryptic answer ...
The hardest thing about being on this show ... You get excited about talking about a certain circumstance, then you realize you weren't supposed to talk about it. Or you're so guarded not to give anything away, you're not completely open. Today I have to do the interview for our final DVD interview and I thought, Why can't I do this after I've read the finale so I can finally know what I'm talking about.
We saw Jin at customs, and then we saw him last week tied up in the back room of a kitchen.
Right, that's not the sequence. You'll see what happens in between in the Jin and Sun episode.
"Kwon" appears written on the cave as a possible candidate to protect the island. Let's assume it is Sun and not Jin, she would be the only woman on the list. Is this a job she even wants?
Well, if Sun does become the candidate, I think she's definitely representing [laughs], being the only woman on the list. And I think it will be a very peaceful island. I think Sun will protect the island but share it at the same time, not keep other people away from the island. I think she'll have a very different take on how she protects it and shares the island.
Are we ever going to see Jin and Sun reunited?
I know, it's been so long. It will happen, but not quite the way I think the viewers would expect.
Source: Full Interview with NY Mag
