Spoiler From Zap2it - 7th September 2012

Now that Elena has turned into a vampire, Klaus' motives this season are still a little unclear. We know he's not going to be pleased with his sister Rebekah for "killing" his only doppelganger blood source, and we know he's got designs on whisking Caroline into a more glamorous life. Aside from that, though, we have yet to learn what will keep Klaus in Mystic Falls after he gets his own body back at the end of the first episode.