1. Jack and Ben are right where we left them last Spring, in the funeral parlour with Locke, and this season's action will start there.
2. Several important questions will be answered right off the bat, including why the Oceanic 6 must return to the Island, exactly what happened when Ben moved the Island and what Sun meant when she said that she and Widmore had common interests.
3. Remember The Arrow Station, where the tail section survivors hid from the Others back in year 3? We will revisit it and be informed of its very interesting purpose pretty early on in the premiere.
4. At least three people will be killed in the first act.
5. Sayid and Ben seem to be on especially bad terms.
6. Several characters who we've watched die will make return appearances.
6. Sawyer is shirtless for all 42 plus minutes of the first episode.
7. Daniel Faraday and his life's work play a pivotal role in the premiere.