More than half of the stations owned by Lotus Communications broadcast in Spanish. So you'd think buying a station in a market on the Mexican border, the likelihood of a Spanish-language format is high.
If Lotus wanted to do an English language format, wouldn't they ask the current owner to keep it Adult Hits for now, which is #6? Even if that's not what you'd want to do eventually, why not leave it there, hoping some of its listeners will stick around when you take over and work your magic? But who knows?