User blog comment:Godzillavkk/Star Craft 3 story ideas./@comment-157464-20190114003759/@comment-31277203-20190120042506

Which, again, is only speculation. There are those on the battlenet forums who said the final scene was actually him hallucinating the whole thing. As for why he was never heard from again, it's because he went out the bar and then got eaten by cannibals.