I like Randy a whole lot, but Fedor is a class above and always has been. He's just too fast and too many skills in his game.
Until/If this ever happens then I'll talk about it, until then its all bull**** plus I'm sure you all know who i think wins.
I can see a scenario where Couture wins of course. He gets a takedown lands a elbow on Fedors paper thin skin and the fight gets stopped sounds crappy but its actually likely considering Couture has great takedowns and GNP if that fight hits the ground worry Fedor fans I know I would. Although im a HUGE Randy fan I do relize its unlikely he wins just like it is for anybody that faces Fedor.
I'm not sure Randy would want to take it to the ground, Fedor on the ground is probably worse to face then fedor on his feet, but you are right Randy's best chance is to try to land an elbow for a cut stoppage. I see no other way for Randy to win.