Not gonna happen. Virtually no one knows about the South American Games in Brazil. The major TV networks ignored the event, and not even channels on cable TV are broadcasting. It's like it just never existed. Why would the federations care about a competition virtually no one cares about around here? Too bad, I know, but unfortunately I can't see things changing in the near future, unless we host the Games in 2026.
Like @vinipereira said, this is mostly seen as a competition for lesser known or beginner athletes, and I have to say I also like it this way. If we send out best athletes, I believe the results will not be exciting. In gymnastics, for example, we sent our best gymnasts and so far we have 16 of 21 gold medals. Of course we have world class gymnasts from other nations (such as Tomás González from Chile and Jossimar Calvo from Colombia), but even they can't keep up with the Brazilian athletes. The best thing that happened was Dominici beating two Olympic finalists and earning gold, but this was the only good surprise of the whole competition, in my opinion.