As I best understand it: a certain poster accurately teased the MH World reveal, name, and meltdown from it not being quite what fans wanted. In the aftermath of Nintendo's spotlight people began wondering about XXs prospects, and he popped in again to shoot down hope, claiming that Capcom had no plans for XX's localization.
People are taking that word as gospel and assuming the absolute worst. I don't know if this poster has additional credibility, or if people are assuming the worst, or if its cats and dogs living together, mass hysteria. But that's the gist of it from what I understand.
He didn't tease meltdowns because of it not being what fans wanted, he teased meltdowns because it's not on Nintendo, and now I guess that makes sense bc he also knew XX isn't getting localized, meaning Nintendo users in the west get nothing.