I'm a fan of Sherlock (if you all did not assume that by stalking me on Pinterest), and though I don't condone all the material, I certainly enjoyed most of the episodes. Seeing the teaser for season 4 brought slight  major heart pounding, and "oh my gosh it's her" (or him depending on the very quick scenes that flash by in the trailer) moments.
If you haven't see it for yourself take the time here...

So first off. I believe that Moriarty is absolutely NOT coming back. He can't. There's no way unless he has a twin (which is highly probable considering it HAS been done in Sherlocky books).
The "did you miss me?" I assume is coming from some of Moriarty's side kicks, namely the villain we lay eyes on who is going to be be wonderfully (if you can call it that) evil if he's anything like the story "The Adventure of the Dying Detective".


The woman assassin by the way is Mary without  a doubt. Just pause it over her face (or watch it a couple of times) and it's her.

Yeah this was my expression pretty much through the whole trailer And by the way, I think Mycroft is a traitor. He did something really wrong sometime and I'm pretty sure whatever that is will destroy everyone. And now I'm really excited for the official episode trailers so we can get a better glimpse of Mary as well as that new baby!  What was your trailer reactions? Do rant below. =)   No I didn't miss you Moriarty - I miss the show