Silva most likely will retire on a winning note. But I think he would be hesitant at the idea of fighting Fedor in Russia. It would be the first time (outside of his fight against Rich) where he would be fighting in hostile territory. He would also be the "smaller" guy as Soares would put it so Would the risk/reward ratio be favorable for him to take the match?
I would like to see this matchup. It would create much more media attention and fill the forums of Fedor fans vs Silva fans. Brazil vs Russia. P4P legend vs P4P legend.
Of course this is all just talk