I'd pay to see a straight up submission grappling match between Kurt Angle vs.Shamrock...Whe you think about it it isn't that out of reach.For instance the WWE had a non scripted tournament of boxing with takedowns called the "Brawl for All",in which the winner of the tournament was to fight Butterbean.Bart Gunn ended up beating JBL (Bradshaw in them days),Dr.Death Steve Wiliams and Marc Mero I believe...of course when he fought Butterbean.....
http://www.youtube.com/watch?v=UnkrYmBWth4
The only difference here is that Kurt Angle who defeated well respected UFC veteran Matt Lindland to win the gold medal in the 1996 olympics,so Angle is on the level...He is a gold medalist grappler and Shamrock isn't the best Jiu-jitsu guy..Shamrock doesn't work well of his back anymore.So it would be interesting to say the least.Also I think they brought in a Sumo champ to have a sumo match with Big Show...not sure,and not sure if it was scripted.