User blog comment:Werthead/GAME OF THRONES appears on THE SIMPSONS/@comment-867479-20111230002641

A crown of curly black hair and a black uniform. Definitely looks like Jon to me. Also, the appearances seem to be based on those promo posters back from when Season 1 started, which showed everyone sitting in the Iron Throne. They were Ned, Daenerys, Cersei, Jon and King Robert (who might well be behind Ghost in the Simpsons scene).