Here's how WLM puts it: "Chang mentions the Kerr Metric, which if you look on Wikipedia, the following paragraph could relate to what happened to the Island. "Even stranger phenomena can be observed within the innermost region of this spacetime, such as some forms of time travel. For example, the Kerr metric permits closed, time-like loops in which a band of travelers' returns to the same place after moving for a finite time by their own clock; however, they return to the same place and time, as seen by an outside observer." I suspect the Island will return to the same place and time as it was when it vanished, yet days, months or years may have passed for anyone on or near the Island."
This Kerr Metric theory is really complicated, but includes the possibility of a spacetime spheres (if I understand it correctly) which allows a sphere of existence within an outside area of existence. Here the inner area could have a different spacetime, while the outer area retains it's current spacetime. Also according to the Wiki: "...the Kerr metric describes the geometry of spacetime around a rotating massive body." That rotating body might just be our island, when the conditions are "right". I know, it's weird, and even more dizzying than that because it includes spinning black holes and I'm not even too clear on regular black holes yet! But as I am wont to do, I'm trying to locate some graphics that can assist with comprehension.
BTW, all this involves an "ergosphere": "...a region located outside a rotating black hole. Within the ergosphere, spacetime is dragged along in the direction of the rotation of the black hole at a speed greater than the speed of light in relation to the rest of the universe." Could this ergosphere actually be our mysteriously unstable, and often stormy, island barrier that has to be traversed via an exact bearing? In the following illustration, the ergosphere is adjacent to the event horizon, i.e., the point of no return at the edge of the black hole. And as a secondary thought, does turning the Wheel initiate the spinning black hole? Just wondering. I must say, TPTB have their work cut out for them after revealing this explosive tidbit this summer.
This formula makes sense too, right? Heheh, just kidding. P.S. Much thanks to Ellen for bringing this theory to our attention over at the TLC ARG blog. :-)