In it's current set up WWoS is much more of a destination for participants of sporting events taking place at WWoS as opposed to those wishing to be entertained. Nothing wrong with that, I think it makes a great destination for young athletes to have their national finals etc at a destination that offers much more than just the pressure associated with those types of games.
I don't think that was what it was originally planned for but maybe it has been more difficult to get the plans moving than they expected. My original thoughts were they wanted to have a major sports team based there ( probably baseball) and their Spring Training camps were part of a "softening up" campaign to get a team to move there. I also think that there were plans for the Magic to be moved there and the long ongoing discussions about the facilities ( or lack of them) for that franchise where again part of the softening up process. I think there were a lot of hopes that should the Olympics get hosted somewhere in the area then Disney would pick up a lot of the minor events and also be used for accommodation. More important would be the financial rewards and the media facilities that Disney has ( production studios etc) would lend itself well to dealing with those problems. Obviously the fact Disney owns a major TV channel would help that company to win the franchise for covering the Games.
I know that there were plans to put on, what in the US are, minority sports. There were plans to host an international cricket tournement there ( hopeful IMHO) , but more promising IMHO would be to use the stadium to host a Rugby 7 a side tournement there. There is a world wide circuit of tournements and while the USA isn't one of the VERY top nations they can compete in the second tier. With the internation appeal of WDW I think support (visitors) from England, Scotland, Ireland, Wales, Canada, Argentina, Japan would guarantee a reasonable crowd and if enough "non rugby" fans turned up to cheer on their own countries those people would find this game is a real crowd pleaser. Four of the top 5 countries ( Australia, New Zealand, South Africa and Fiji ) don't have a massive natural number of people who go to WDW but I can guarantee if that competition were to take place a very good ratio of expats working in the US would travel to WDW just to see the competition. As it only takes a longweekend for the whole competition (3 days) I think it would work very well.