It's not intriguing at all. Prime Randleman was literally a monster hence his nickname. Let's be real Brock's accomplishments in this sport are VASTLY inflated. Prime Kevin KO'ed Dan Bobish who is/was literally a mountain of a man and outweighed him by close to 100lbs. Then again watch Kevin vs a top quality pedigree wrestler in Erikson and he got owned in under a round. Kevin was a FANTASTIC wrestler in his younger days and applied that VERY well in MMA vs top quality opponents including the likes of Bas Rutten. You best believe Kevin single or double legs the crap out of Brock and pounds his big dome into mincemeat HammerHouse style.
Kevin was strong. But not strong enough to suplex a guy that big physically. His dimensions would have been too great even for Kevin who was only a diminutive 5ft 10 or so.
Lesnar wins, it would be the first match where he has a advantage in strikin, his wrestling is at least as good as Randlemans and he is hust to big. But Randleman has/had some talent if he was younger and would train in a proper gym he could be one one of the best at 205, but he is to old now
Randleman benched over 300lbs and Fedor was 230+. I think a 270lb Brock wouldn't provide much of a problem.
It's not that simple If Brock was a barbell instead of a human being may be it would be plausible. But he's not. Benching static weight and picking up someone and slamming them are two entirely different things which require different kinds of technique and strength.