Grey's Anatomy Season 9 doesn't premiere until September 27, 2012, but that hasn't stopped ABC from releasing some tantalizing teaser promos. The first promised Season 9 will be the most dramatic season ever. Now, this new promo says that on September 27, "The world will know … what happened out there." There's no new footage, but it still manages to get us totally pumped for the new season. Check it out below.