The previews seem to indicate that the cop handcuffed to Sayid is now on the island. Therefore, it seems possible that the Indian guy might be there too.
I'm guessing the flash transported them, as opposed to crashing the plane. Didn't the plane crash last time because Desmond hadn't pushed the button at the right time or something?
BTW, speaking of Desmond, you don't supposed Ben's "loose end" was killing Penny (as he threatened to Whidmore) before heading back to the Island do you? If so, that would explain why Desmond goes back.
That would royally suck if true, by the way. The Desmond/Penny thing was the one part of the show I was really hoping had come/would come to a happy ending.