I suppose this could count as a potential spoiler for those staying totally and utterly spoiler free (so much so that they don't know who the big bad is in S6...)

But I came across this today - and it is very odd. Shadows moving offscreen, a sarcophagus that keeps on shifting with a mysterious humanoid shape shadow behind it...could this be one of the instances where we're supposed to have noticed something obvious?

(All credit to the original poster)
http://www.boards.ie/vbulletin/showt...php?p=66865134