Yeah, comebacks, although romantic, are almost always a disaster. Chris hopefully understands this. But who knows? These dudes usually want to take another kick at the cat. In my opinion, Cormier was a great bodybuilder who wasted much of his talent pursuing the party lifestyle. Or so I have heard, time and time again.
Bodybuilding at the level he competed (and in this modern era) pretty much guarantees a best-before date. The drugs and hormones in such quantities absolutely cuts short the length of time one can be awesome, in size and strength. Slow and steady might not produce quite the same freakish results, but a person's ability to keep going at it, hardcore, is that much longer.
Powerlifters (of which I am one) can continue to train with brutal intensity and poundage long after the age of 40. I am proof. But I haven't used juice like these pro bodybuilders. Not that powerlifters don't juice up, of course, but it isn't the same, and unlike physique athletes, skin elasticity and such isn't a concern.
Anyway, yeah, Chris "The Real Deal" Cormier ... He doesn't look bad at all in this video, but he's obviously WAY down in size. But what else can be expected? The extremes they go to get that size are, well, extreme.