I do not know if they will show us some mysteries past scenes detailly in season 6. But if they will, I want to see following scenes:
Who is Sawyer's father ? Is he someone from the island ? Do we already know him ? I want to see his face at the suicide scene. I want to see first-John Locke-Monster meeting. We are not even sure If that was the monster that we know. What happened there ? And last, I wanto to learn why Claire was smilling crazily in the cabin. I am sure that you all have something like this in your head.