Does anyone remember Bruta who was mentioned in The Sword in the Stone: Part Two?
I think Julian Glover's character (creepy guy from the trailer) is the spirit form of him!
I know the story Merlin made up about him forseeing the future was only made up... but it would be ironic if it were actually true!
Look at the way he talked about Arthur! He said he had waited so long for this to happen. And that was what Merlin's story was about... Bruta had forseen that Camelot's greatest king will rise.
He also said "the seeds of our destruction". He's referring to Camelot as if it is his and Merlin's.
I think he is Bruta!!!