I have long hoped to hear more about what happened "that night"--how Jack found out about her, how she got away, etc. Both Jack and Irina have kept their lips tightly sealed on that subject and Sydney hasn't really asked much about it.
I really want some backstory on this as well. I get frustrated with Sydney for not asking more questions! I too, am anxious to learn about Sloane and Irina's interactions when she was "Laura" and if their current arrangement/plan was conceived long ago (almost thirty years?).
I won't ask for your theory because I wouldn't want to jinx it. However, you must tell us if it plays out as you expect.
As for my theories, I seem to alter them somewhat as each episode brings forth new information.
Thanks verdantheart for your thoughts!