I was thinking to myself the other day how cool it would be if we found out that while he was still an Other that Ethan had "gone rogue" when he went nuts trying to recapture Claire. Up to this point The Others haven't killed anybody with the exception of Ethan offing Scott which made me curious and wonder if they're on standing orders to not kill, only abduct.
I'd really enjoy something like Jack, Sawyer or Ecko managing to capture an Other, maybe one of the foot soldiers who abducts people and letting Sayid go bamboo on their ass to find out the whole story. I don't see us getting an Others flashback episode anytime soon so this would be a good glimpse into their world.
Oh, and MDH should spoiler-tag those episode previews.