User blog comment:Jimeee/Bethesda tweets mysterious teaser picture.../@comment-5469467-20121103025959

Strange. I'm thinking that this is a new piece of armor, possibly faction or quest related. It appears to have some resemblance to a dragon priest mask as Jimeee says, so it might belong to a new type of or even unique dragon priest. It may even be unique in a similar way to Konahrik's mask.

Besides all this, if the next piece of DLC is indeed set in Solstheim and has some of the features speculated, it may be the best DLC Skyrim has had yet.