I think the only way Fedor loses is from the new unified rules the UFC is imposing, having recently bought pride.
Reason being, Pride never had elbows on the ground. There are now, with the new rules.
Fedor seems to cut easily. so that person that can take him down and have top positioning while throwing elbows will win.
Although it will be b/c the ringside Dr. stops the bought due to the cut. Not b/c Fedor submits or gets KO'd.