If Bonnar gets Anderson down and takes a full guard (which is hard to see happening), Anderson will easily tie him up. As I said, Anderson's BJJ improved a lot in the second Sonnen fight and he managed to keep Sonnen in place and stifle all of his work, which no one before has been able to do. If he can do that with Sonnen, he will easily do it with Bonnar. Stephan is an alright grappler, but that's not going to be enough here. He needs a war, and he gets to decide wether it happens or not.