+1
Couple of thoughts:
-- The Losties didn't kidnap anyone. That was the Others. And they're now with the Others officially. (We've seen Cindy the flight attendant there voluntarily, along with some of the children.)
-- Locke can still be dead in that future time. It's been at least three years since their rescue, and we can easily still be shown elements of that time period in between. Obviously we will be shown what's going on on the island that Locke says is getting bad. What's breaking down there, exactly? Are the Others rebelling against him, or are the remaining Losties now outcasts from the Others again, despite having recently rallied against a common enemy?
-- Frank doesn't necessarily have loyalties to those "shipmates." Remember, he was hired separately because of his ability to pilot a helicopter. Many of the "shipmates" were the mercenaries, and there's no love lost there with Frank. The only remaining shipmates he might have had loyalty to were Michael (below deck at the time of the takeoff), the captain (now dead), and what? some other deck hands he probably didn't know very well? I'm curious what HIS story will be once Penny's boat gets back to civilization, though. Desmond can make up almost anything and it would fit in with Penny somehow. But Frank? A little tougher.
-- Why is Sun willing to help Widmore in the future? Is it because Ben is going after Penny? (Sun now knows Penny after spending a week on her boat.) Or is it because she previously said to her father that he was one of TWO people responsible for Jin's death? Does she mean the other person is Ben? Does she find out he killed Keamy and thereby caused the explosion of the ship? Or is she blaming Ben generically (a fair thing to do)? Or did she mean a different person entirely? Jack, for not letting them turn around and go back for Jin?
-- I'm assuming still that Sawyer's favor from Kate involved his daughter. And I can't wait to see THAT "reunion," since Kate inadvertently already knows this woman who is the mother of Sawyer's daughter!
-- If they do drag everyone back off to the island, including a dead Locke, will the island heal him? Part of me says that would be inconsistent -- after all, even Michael couldn't "die" on the mainland until the island was done with him. The fact that Locke is dead seems to suggest that the island is done with Locke three years hence.