I think the original poster and maybe most other folks don't fully understand the dynamics of the Spanish-speaking radio audience. David started to discuss it. The simple fact is, people from the Caribbean don't have the same tastes in music or sports as those from Mexico and Central America. This is why existing ESPN Deportes stations in New York and Miami perform so poorly in the ratings.
ESPN Deportes is mostly about Mexican and International soccer. I'd imagine most of the hosts and commentators have Mexican accents and some shows originate from Mexico. Sometimes Deportes carries live games from Mexico, Latin America or Europe. This would be of little or no interest to someone who's roots are in Puerto Rico, Cuba or the Dominican Republic. Soccer is not a big sport in those places and certainly Mexican soccer holds no interest. It would be like an American radio station carrying programming from AM 1089 TalkSport from London, with British-accented hosts discussing soccer and cricket.
But I'm sure some GMs think Spanish-language Sports Radio is as generic as English-language American Sports Radio, which is how Deportes wound up on 860 for a while in Philadelphia, and why it's on 50,000 watt 1050 in NYC. Perhaps someday someone will put a Spanish-language syndicated sports service together for the Eastern U.S. and Caribbean, talking about American baseball, basketball and football, and the baseball leagues in Puerto Rico, the DR and Cuba. But since such a station would not get much interest in the rest of the U.S., it may never happen.