A bootleg of the Wolfman trailer shown at the last Comic Con has leaked on the web (via Eni), here it is:
Update: The official trailer is now available:
Below the former trailer of the Wolf Man:
THE WOLF MAN
“Upon his return to his ancestral homeland, an American man (Del Toro) is bitten, and subsequently cursed by, a werewolf.” (IMDb)
I think this movie is going to be rated R for its gruesome violence. Judging from this Wolfman trailer, bloody disgusting scenes will be plenty in the movie: the Wolf Man must be hungry!