The film is now in production!
Here is an interview with lead actor Damián Alcázar with more clips from the film
And here is there trailer in English
Here is an article in Spanish about the film.
Ana María Hernández Guerra reported this on her blog almost 2 years ago! Hopefully, it will be realised very soon.
“The president of El Salvador Gral. Maximiliano Hernandez Martinez was a great admirer of Barrios, calling him “One of the chosen ones”, whose artistic culture does great good for those who listen”. After a concert attended by dignataries(Including the Paraguayan ambassador), Gral. Martinez appointed him Professor of guitar at the national Conservatory, presenting him with a check, declaring that he must stay in the heart of America, El Salvador”.
In the meantime, you could just enjoy this!