For me Kim Yuna bombing would be the biggest shocker especially since apparently few can beat her even she makes mistakes. It's between her and Rachael Flatt but since I had to choose I picked Kim. Kim messed up a couple of times this season but so did Flatt. And Kim gave awesome performances under much more pressure than Flatt so I still believe in her nerves of steel. That's my reasoning. Flatt gave the performance of her life at national when she was under the most pressure she's ever been so her bombing at the Olympics would also be a stunner.
Everyone else has definite bombing possibilities. But I have faith that we will not see a splatfest.