Ok, season two has finally come and after watching the first episode we can see we aren't going to be as disapointed as last year so here's my theory on what the island is and why "brother"(that guy that was running at the stadium with jack) was in the hatch. I think the island is purgatory. If you don't know what purgatory is then look it up, and you will understand. Questions that need answering: Come up with your own but... 1.) Why does it say "quarentine" on the inside of the hatch? 2.) How the hell did locke get into the hatch by himself? 3.) What was that light that came out of the hatch? 4.) Who are "they"? 5.) Where did those people on the boat bring that little kid? 6.) What was that room that when jack walked by, his key floated towards it as if it was a magnet?