Spoiler!

TV Guide has some scoop on Klaus:

How the heck will Klaus feel about losing the doppelganger now that Elena is apparently going to be a vampire on The Vampire Diaries? — Sarah

NATALIE: We’ll let executive producer Julie Plec take this one: “The loss of the doppelganger is gonna be a BFD for Klaus and will drive his actions for the season. Suddenly he’s vulnerable for many reasons. There’s a stake that can kill him, a witch that can desiccate him, and no way to build up the hybrid army he needs — psychologically, at least — to feel safe. Plus, Caroline’s going to be peeved at him once she realizes he bamboozled her. In other words, he ain’t gonna be so happy.”