If Fedor totally dominates Hendo then I guess he can pretty much choose what he wants to do with his career. Whether its at LHW or HW. He won't go to the UFC until Strikeforce finally fold into the UFC. I'm not entirely clued up on his contract situation, who is?, so I guess it all depends on that. I'd like to see him go down to LHW. At HW, I really don't see him beating Cain, JDS, Lesnar or maybe even Carwin or Mir.
I know he would have a challenge or 2 at LHW also, I just think against guys such as Machida, Rua, Evans he would use his strength and weight advantage to counter the superior speed of these fighters. Of course against JBJ he'd probably be screwed unless he can pull out an armbar on those lanky arms.
I believe in the LHW division he can at least be relevant, maybe a top 5 fighter for a few years to come. He can't be that far towards the tail-end of his career. Hes only what, 34,35? And its not like hes been in the wars Wandy and big Nog have. I hope he stays around for a while.