Tonight’s season finale certainly didn’t disappoint – and now we have indeed found some spoilers to have been true. We also know a bit more about what will happen next season on LOST. But there are a lot of details in tonight’s episode that we’ll be pondering for the rest of the series, and perhaps longer.

Charlotte had been born on the island. My guess is that it is only since the Dharma Initiative got there and caused the “incident” that released the electromagnetic energy, that women have been unable to conceive. Perhaps Charlotte was sent away from the island as a child, because of the dangers. Could Charlotte be Annie, Ben’s long lost love from his childhood?
Ben wants to figure out a way for all of them to return. But Christian and Claire are opposed to that plan.
That chamber Ben entered that was cold, with a giant wheel that one turns to move the island. Who made it? Some ancient civilization? Aliens? Who first discovered the power of the “negatively charged exotic matter” there? While Dharma was “running silly experiments”, the power of that place lay hidden behind the chamber.
Next season’s finale will presumably be when we find out whether what Ben said was true, whether the one who moves the island can never return. Ben had certainly left the island and returned, but presumably that had been a more ‘normal’ use of the Orchid station’s power. But Ben knew what to do. So who had left the island before? Perhaps Jacob did. Or perhaps it was Richard, and the result is that Ben, like Richard, will stop aging.
How did Locke leave the island? Was it via the Orchid station? Or did he not really blow up the submarine? Or does he have to move the island again himself eventually? What terrible things happened after (and because) Jack and the others left?