Anything can happen in a fight, but between Emelianenko and Couture, it looks like time's catching up with Emelianenko faster.
Lack of competition has got to be affecting Fedor too. In the past year he's beaten a novelty (Choi) and a middleweight (Lindland). Neither of his 2006 opponents (Mark Hunt and Mark Coleman) have been back in the ring since those fights.
So the two might be well advised to get in the ring before they become yesterday's news.