Vampire Diaries and Vampire Diaries Merchandise

Major Spoiler Alert

Here is the scoop from TV Guide:

What’s coming up on Vampire Diaries? — Monique
MICKEY: Witches and vampires aren’t the only supernatural creatures in Mystic Falls. It won’t be right away, but a major male character will reveal himself to be a werewolf. And don’t think having read the books will help you figure this one out. In fact, the werewolf in question won’t even know he’s a werewolf, initially at least.

If you have read the books, I have, we know who turns out to be a werewolf. If it’s not him then who? What do you think?