Don't underestimate Kimbo and his newfound abilities. He was always a tough street brawler but now I feel he's really put an MMA repetoire together working with Bas Rutten and Randy Couture and earning both of their praises. Now... That having been said I still feel that Brock takes this fight with his incredible size, strength, and wrestling ability. Kimbo would have no answer working from his back, which is inevitably where he would end up. I am really looking forward to seeing Lesnar in more MMA action; I think he's going to be a monster in the heavyweight division for quite some time, being relatively young and still improving every day. Should be quite impressive to watch in action.
It doesn't matter if you don't like them; Anderson Silva and Floyd Mayweather Jr. are the best at what they do and it's not even close. The only way to shut them up is to beat them in the ring.