“Vengeance” (“Venganza”), pitched as the biggest-budgeted Mexican action movie ever produced and the first Mexican original from Amazon MGM Studios granted an exclusive theatrical window before streaming, has rolled off Prime Video as a bona fide global hit, taking the platform’s No. 1 spot in territories as far-flung as Nigeria, Indonesia, the Philippines and Italy. For producer Pablo Cruz , the El Estudio chief who shepherded the film over six years, that vindicates an argument Mexican producers have been making for a decade: Locally-rooted genre, made at scale, travels. It also, he tells Variety , exposes how little visibility producers have over their performance data on the platforms now bankrolling the much of high-end Latin American film.…