Fedor has shown that he can handle larger opponents. Look at his fight against kevin randelman or hong man choi... they muscled him around, yeah, but he got them both in the end. You have to think about brock, too, and how he's handled his fights. He's shown that when he gets someone on the ground, he doesn't let them up... just like mir and heath herring. I somehow think that fedor would spin out of lesnar's death grip and arm bar him, though. My money is on Fedor. I also got the feeling from the article that the UFC brought brock in to play the part of the bad guy, have him take the title, then have a well respected challenger come in (fedor) and clean him up. It's all about dollars for the UFC, though... is it worth more to them to have brock around in future ufc's defending his title, or would they make more having him taken out by a new challenger now that he's cemented his reputation? I'll bet that the UFC keeps him in for another couple fights before bringing in the Last Emperor (fedor).