Would be a really tactical fight I think, they both often wait to counter. Won't happen anytime soon though. Machida is going up against Shogun for UFC 104 in October. Anderson Silva is going up against Dan Henderson in middleweight at a yet unknown date apparently, probably sometime at the end of this year. UFC 105 is going to be held in England, Manchester. Also, the next Ultimate Fighter series starts in september, heavyweight edition. With Rampage and Rashad Evans being the coaches, and they'll go up against eachother at the finale in december. Apparently Kimbo Slice is one of the competitors.