Well duh - besides Vincent, obviously. We all know he's really the key.

www.lostpedia.com/wiki/Adam_and_Eve, of course.

or . . .

The Ghost of Jack's Dad

meets up with Claire's Ghost because she dies and must then go with him becuase they are really lovers and Aaron is the offspring. And they are the Adam and Eve storying and Aaron is like .. . .

<<I like Des and Pen >>

IF we're dealing with an over-arching time-loop (and that's one mighty big "IF" that I personally don't favor, but if we are...). then yeah, I could easily see Des & Pen becoming Adam & Eve before all's said and done.

Am I even more confused than usual or were there not also parts of an earlier crashed airplane --not the Oceanic 815, but some earlier big plane-- associated with Adam and Eve at rest in the cavern? I remember thinking "That looks like part of the tail section of an old Constellation" upon seeing some wreckage or other associated with the caves a couple/few seasons ago. If I've remembered that part correctly, then do we know the type of that older make of airplane? The type of airplane would give a "not earlier than the year 19__" date for Adam and Eve's return to the island, pre-DHARMA Initiative ...given that Adam & Eve are indeed actually Jake & Kate, Bernard & Rose, Ben & Annie, or Des & Pen.

Jack & Kate is the easy (in the sense of more predictably formulaic) guess, especially if I am right about a Jen & Kira "Dark Crystal" influence in LOST, but I think at this point I'd actually aesthetically prefer Jack and Kate to each come to dramatic and noble ends --perhaps trying to save Aaron-Jacob from Abaddon-- while Des and Pen survive all the various trials to board a Constellation back in the 1940's or 1950's ( en.wikipedia.org/wiki/Lock...stellation ), crash on the island, and then blissfully live out their golden years together peacefully in love amidst the Eden of a stress-free tropical garden paradise, already confidently knowing the ending of their own personal stories. Love, commitment, and virtue such as Des & Pen's for one another must somehow be rewarded if there is any justice in the universe.

I'd say likewise for Bernard & Rose, but they have already had a good long run, know their love for one another beyond all question, and have come to a mature place of accepting their passage together, hand in hand, from this dimension as they make space for new folks to enter here. Des & Pen, by contrast, are still relatively young and have never had the opportunity to fully embrace and explore their love through really living life together and completely sharing experiences over time with one another.

Adam & Eve turning out to be Ben & Annie would be a real long shot, as would any pairings such as Hurley & Libby or Sayid & (?) and so on, IMHO.