Ausiello Spoilers Just a bit on Izzie 

Question: It’s looking more and more like they are paving the way for Katherine Heigl’s exit on Grey’s Anatomy. Do you know if she is going to stay or not? —Kate
Ausiello: I don’t. And neither does Heigl. While I’m sure she’d love nothing more than to move on at the end of the season, the decision is not hers to make. Heigl’s got at least another year left on her Grey’s contract, so her fate rests with ABC and Shonda Rhimes. My gut, which has rarely steered me wrong in the past, tells me they’ll let her walk.