I just had a thought…
Fringe is in a position to do something that almost no show has been able to pull off successfully.
Suppose, at the end of the season, Olivia is killed. For real. No fakeouts, no “just kidding”, no saved by some improbable fringe science at the last minute. She’s dead.
It isn’t like Anna Torv would be off the show or that Olivia would really be gone. After all, she’s still alive in the other universe (and may get a bit pissed when she realizes that Walternate was behind what happened to her).
Consider, they’ve already been slowly killing off the other “duplicates”. Charlie only exists on the other side now. Broyles on the other side was killed and only exists on this side. And there has only been one Peter all along.
The only “duplicates” (among the major characters anyway) at this point are Olivia, Astrid and Walter. Why not get rid of one of them?
It would seriously be one of those WTF? moments that Fringe has pulled off several times so far. I could see them doing it.
So, I’m calling it now… Olivia dies in the Season 3 final.