User blog comment:Blood Reaper/Skyrim Dawnguard Trailer/@comment-24.156.91.84-20120531181920/@comment-4353017-20120601101614

He's referring to an old blog post which posited a theory about the unexplained runes carved into the underside of the Torchbug in a Jar, Butterfly etc etc. It suggested that a translation of the runes suggested an impending apocalyptic event in Skyrim.