User blog comment:TheUnown/What could have been/@comment-5570376-20130520050233/@comment-5320851-20130523230918

That wouldn't be a big plot twist. Some sort of betral from Stan or someone nearly killing Dipper or Mabel or something like that would be. You don't see plot twist coming, and remebering the nomes in the first episode, that wouldn't be one at all for Gravity Falls. :P