I am legitimately terrified that heaven is going to brainwash Castiel, use him as a weapon against the Winchesters, and when Castiel realizes this, he will feel such tremendous guilt that he will rip out his own grace.
WHAT IF THE FIRST TRAILER WILL BE LIKE, RANDOM SHOTS OF BAKER STREET AND SCOTLAND YARD AND JOHN BUT NOT OF SHERLOCK BUT IN THE VERY FEW SECONDS WE SEE JOHN LOOK AT SOMEONE WITH HUGE EYES AND A SHOCKED EXPRESSION AND ALL WE HEAR IS A DEEP VOICE SAYING "John."
