A sixth place medal? Certainly not in this century but maybe the next?
Why? Well it all goes back to the Olympic Spirit - via the rings and continents. There are five rings on the Olympic Flag which represent the 'five continents.' The five continents represented in the flag are Asia, Europe, Africa, Australia, and America. Oddly North and South America are counted as one continent.
Thus after Antarctica is successfully colonized and develops their own nations, hopefully though peaceful means as did Australia and New Zealand - there will be a logical need for an extra ring, when they send athletes to the Olympics in the 22nd Century.