Now, the bad news is that, according to some lame executive estimations, in the whole Latin America (Argentina, Brazil, Mexico, Chile, etc.), there's -in the best of cases- market for just around 40.000 copies for an eventual zone 4 Extended edition DVD, and that wouldn't justify the costs of translating all the material, adding subtitles, etc.
To make it worse, zone 1 DVDs don't have Spanish subtitles, so they're not an option either for a good bunch of Spanish-talking community.