As previously mentioned, Teddy suddenly has a realisation that she loves Owen and feels some kind of fire for him, though she's still dating poor Tom and Amelia is still involved in Leo's life. Anyway, her water broke and it looks like Amelia is trying to get her to the hospital in the middle of the storm in the finale promo. Which already seems dangerous!
Kim Raver has just returned this season to be a series regular again, so she's probably not going anywhere. But knowing this is Grey's Anatomy, my prognosis for a dramatic birth is 100%. We could see a medical complication or Teddy being worried about Owen like Bailey was for Tucker during her bomb scare birth.