And as it happens, one of the newly-released sneak previews of that episodes? Features the sword itself, although in this case it’s being treated as the replica of ... well, “a sword on pay-cable”, but it’s unclear if they will actually name Game of Thrones. In fact, Valyrian Steel’s sword is based on the description as given in “A Song of Ice and Fire”, and has Martin’s direct input, much as their Needle, Ice, and King Robert’s Warhammer have.
See the clip below, as Sheldon and Leonard barely keep from drooling all over the weapon!
Thanks to ElaineLua for pointing out the clip!