Howling:Hidden clue in Matt Smith's goodbye message

I noticed something in Matt Smith's Bob Dylan homage that made me think. At about 0:54 seconds, when it says "TO THE FANS", there's an image of some vampire fangs. Now it first seemed to be some sort of cheap pun, but could it be a clue to the next Doctor somehow? Especially since Matt would most definitely know who it is if he's already been cast. Gallifrey102 ☎  12:18, July 18, 2013 (UTC)

The Doctor becoming a Vampire? Surly, you are not suggesting that! ;)

If anyone, I would want it to be http://whatculture.com/tv/doctor-who-6-actors-who-could-be-the-12th-doctor.php/6