Joe Son vs. Helio Gracie
Who would win? The ultimate battle, between the founder of Joesondo, who taught Kimo everything he ever knew about Tae Kwon Do, and the founder of the almost as good Brazilian Jiu-jitsu, Helio Gracie, who taught former UFC champion Royce Gracie everything he ever knew about Judo.
My call: Helio's apparent inabilty to put any power behind blows to Joe Son's groin will not come into effect on the ground as he will be looking for a submission. However, Joe's greater mass and low center of gravity will come into play in terms of whether the fight goes to the ground or not. If it stays up, Joe by strikes. If it goes down, Helio by kimura.