I am in agreement with those that say if he comes in only 'headhunting', he won't go far (I think JDS has a good reach and pretty good boxing for MMA). He built his house on striking to set up his ground and pound, finishing with one of the best arm bars I've ever seen. It was always something for fighters to be wary of. He also had incredible pace and never seemed to let up. He slowed a bit in Strike-force, you could see times where Fedor would flurry Rogers and then stand there to compose himself, opening himself up a bit. If he has indeed got that fire back and healed, he is a force against anyone.
If the "I want to believe" Fedor shows up, here's what I think;
-Arlovski - Closer fight but same result, AA taking a nap.
-Mir - TKO, Fedor swarms him on the feet, wouldn't it be crazy if Fedor arm barred him?
-JDS - This could be a bad match up for Fedor, I wouldn't be ashamed to say Fedor lost to JDS.
-Cain - Tough to call, Cain like he fought Werdum, Fedor wins imo. Takes his arm home. 'Revenge Cain', diff story. Could go either way.
-Werdum - I have a feeling that if Fedor doesn't over estimate his own skills in the guard (or at least doesn't go there right away, wait until later when they are both have a full on sweat going--harder to grip) and keeps this standing, he can pull it out, decision or maybe TKO. Play in Werdum's guard is playing with fire though.
If he signs in Bellator, I will still watch, but they have nothing to offer.