Prior to losing to Fabricio Werdum, Fedor Emelianenko was thought of as invincible, indestructible, nigh invulnerable, and some even called him inhuman. And in many ways, the evidence supported these outrageous claims. In 10 years and 28 fights, the man known as the "Last Emperor" cut a swath through his MMA competition like he was a red hot knife slicing through soft butter. No man that opposed him, great or common, could put together enough of a fight to end his streak of dominance. As a heavyweight fighting in his prime, Fedor Emelianenko was a God among men.
Then came Fabricio Werdum and his vaunted jiu jitsu, followed by Antonio Silva with his combination of clean technique and freakish size, and finally, the scrappy old man strength of former Olympian, Dan Henderson. In the span of 3 fights, 3 losses became Fedor's outcome. Gone was the reputation of being a cyborg, in its place came criticisms of being overrated, getting old, improper training, etc. The man once known for being unbeatable couldn't find a win. With that, the most passed around "solution" to his inability to garner a "W", has many fans and pundits alike calling for a drop down to the light heavyweight division to test his mettle there.
If Fedor chooses to do this, I think we will see him definitively retire. Fedors biggest asset is his speed. Fighting these bigger monster heavyweights, his speed is his main advantage. Fighting at the highest level at light heavyweight would take away his most effective attribute at heavyweight. If he fought a Lyoto Machida, he would get blitzed, especially considering the wide looping punches he throws. Dan Henderson is not known for his speed, but watching him evade Fedor's huge looping punches in their main event fight proves my point, if Henderson can avoid getting hit and land his own huge shots, guys like Rashad Evans, Lyoto Machida, Shogun Rua and Jon Jones would have a much easier time avoiding the "Last Emperors" big shots and land several of their own.
In my humble but forthright opinion, I believe that Fedor is done. He appears to be suffering from Chuck Liddell syndrome with these stoppage losses. While M1 Global says he is not retiring yet, I believe he should hang it up for the sake of his legacy. Because as a sports fan, legacy means something. Fedor can avoid becoming another fighter that stayed too long and hurt his status in the echelon of MMA history. No one can say that Chuck going on his retirement tour and getting ko'd 3 times in a row didn't hurt his legacy. Ultimately it will be Fedor;s decision whether or not to walk away, as he has always stated that he is a sportsman, and he competes because he loves competition. But should he choose to continue, his path of least resistance still lies in the land of the heavyweight giants, rather than the killer bees roaming the 205 lb landscape.