well if you are smart like werdum you control the hips and use head movement and intelligent blocking and you look for an arm if you are not already holding one down to the mat or there body. So JDS should have done so if he is a nogueira black belt since that is what big nog is and was known for in pride
It's not just "smart like Werdum", Fabricio has been one of the worlds best grapplers for the last 10 years. JDS isn't a Nogueira Black belt anyway, he trains under Yuri Carlton. There are black belts (Rashad, JDS, GSP) and then there are black belts like Werdum, Maia, Roger, Jacare, Palhares and Vinny.
Maybe Cain will take the Alan Belcher method?
I think he will fight Werdum like he fought Nog, he's not really worried about the one shot KO so he can focus on keeping the centre of the octagon and boxing with him.