I don't usually do this, but I want it on record in case I'm right.
What if the 'other side of the island' referenced here isn't actually a physical side, but an alternate version of the island? They access it through the hatch, and they find the tail end survivors there? Or maybe The Others?
Well, there you have it.
EDIT: OMG MY ICON WON! The one I'm using! It won at the Lost Icon Awards!!!

Green Queen
What if the 'other side of the island' referenced here isn't actually a physical side, but an alternate version of the island? They access it through the hatch, and they find the tail end survivors there? Or maybe The Others?
Well, there you have it.
EDIT: OMG MY ICON WON! The one I'm using! It won at the Lost Icon Awards!!!

Green Queen
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