For the average WDW guest, not much, unless you like to watch youth sports.
There are occasional big events like Braves spring training games and a professioanl socccer tournament or the Globetrotters.
Usually it is youth amatuer sports going on all the time. There always seems to be tournaments and competitions going on for baseball, softball, soccer, basketball, wrestling, football, cheerleading, lacrosse, and probably a few other sports.
It is one of the finest youth sports facilites in the country.
It brings a lot of athletes and their families to WDW during the time they are competing.