Sonnen is always a mess after fights. He's a bleeder, but he beat the shit out of Anderson for the first 22 minutes of that fight. Impressive stuff. Three minutes away from shocking the world. Anderson prooved he's always dangerous and is a true champion. After that fight, I'd give GSP a better chance at taking out Anderson.
Dos Santos has a great shot at taking out Cain or Lesnar, amongst those three I could see fights going any way. UFC's HW div is pretty great at the moment. All they need is that tubby little Russian in the mix.