I'm not convinced yet that Jin is dead. I think he's still alive on the island but Sun has to pretend he's dead. But I'm waiting for Damon and Carlton to confirm it. I don't know about Aaron either... maybe he counts because he was technically on the plane in utero.
I think everyone that's ever died on this show will be back. There are so many plot twists and turns, they'll probably all be back, one way or another. In one of the next seasons. Like a soap opera.
