Because our mutual friend, Desmond, is finally back on the Island, I have exceedingly great expectations for tonight!
1) Tonight's Darlton-penned episode, "Happily Ever After," won't be quite as good overall as Ab Aeterno, but it will have the most shocking reveals of the season and the best episode cliffhanger.
2) We will find out whether Widmore arranged for Libby to give Desmond the Elizabeth or not.
3) We will find out whether the Alt timeline is in any way connected to the present day universe.
4) Smokey will freak out in some way when Sayid tells him Desmond is back on the Island
5) Jack, Ben and Hurley will suddenly burst into song at some point as a way of promoting next summer's greatly anticipated "Lost: The Musical"
Bonus (Serious) Prediction: At some point in the season, maybe even tonight, Desmond will know he's about to die (probably by sacrificing himself in some way) and will pull out "Our Mutual Friend" and start to read.
I'm 100% certain these things shall come to pass.
Enjoy the show! Review up tomorrow morning! :)