Not about the premiere, but about the finale of last season (we're watching PopUp Lost before the premiere)...
The man in the casket. A guy from New York? In an African-American neighborhood at an African-American funeral home? Jack's reaction when the guy at the funeral home asked him if he was friends or family?
What if it's Michael? OR WALT??!
Anyway, I haven't actually thought about it for more than five minutes, but I thought I'd throw it out there, just in case.