I have heard many theories - 3 in particular:

1- that's Sherlock's hand, and he got hurt somehow by or through Magnussen
2- that's Sherlock's hand, and he is in a hospital because he relapsed
3- that's Mycroft's hand...

I actually don´t know what´s going to happen. As already mentioned it seems to be very unlikely that John becomes a father - I can´t imagine that right now, too much against canon. Or does somebody think otherwise? Also there were several hints already that something is not okay with Mary. So in first sight I think it has something to do with her and/or the baby. And honestly: If I had to make a choice, which of the characters have to leave the series, I would chose her. And, no, I am absolutely no Johnlocker, I was never against a Mary, but somehow, I have to confess, I find her nice, but also a little bit boring . There definetely must be a secret, if not, she´d be a very plain person. And I don´t want to miss Molly or Lestrade or Mrs. Hudson!
Or Mycroft, and that´s the next point: Mycroft seems to play a bigger role this time, a role, which I don´t get clear yet. There is something, or? But I don´t hope he must leave the show for any reason.

tonnaree wrote:

I was distrubed by the part in the trailer where Mycroft tells Sherlock "If you go against CAM you go against me."     WHAT!?!?!?

I wonder if he means in a literal sense or in a figurative sense...? For example, maybe it terms of power and influence, CAM is equal to Mycroft and that's what he means when says "You go up against CAM you go against me"...?

I would think that Mycroft's position is that he doesn't want Sherlock stepping on his toes, so to speak.  Maybe he's going after CAM and doesn't want Sherlock to ruin it.

silverblaze wrote:

SilverMoonDragonB wrote:

tonnaree wrote:

I was distrubed by the part in the trailer where Mycroft tells Sherlock "If you go against CAM you go against me."     WHAT!?!?!?

I wonder if he means in a literal sense or in a figurative sense...? For example, maybe it terms of power and influence, CAM is equal to Mycroft and that's what he means when says "You go up against CAM you go against me"...?

I was mostly disturbed by the expression on his face. 

It would be a great twist if he allied himself with this psychopath. A man in Mycroft's position would have to deal with all kinds of unsavoury folks, why not have a deal with the devil when the situation requires it? I'd find it hard to believe that Mycroft's hands would be entirely clean. Then again, quotes in trailers are always out of context, just watch the previous ones. 

Yeah, people in high positions do that all the time. It's called corruption which I'm sure Mycroft is capable of. I wouldn't exactly blame him for that because if the situation requires it it's a perfectly reasonable thing for him to do... but I don't want to jump to early conclusions. I'm sure this bit was out of context.
 

Westwood! wrote:

I think Mycroft saying "if you go against CAM you go against me"means that CAM is too powerful for Sherlock to destroy so it would be better if Sherlock doesn't even try for his own sake..

 
I do hope this is the correct context for the statement.

Isn't he just telling Sherlock to back off, like he did with the Woman?

besleybean wrote:

Isn't he just telling Sherlock to back off, like he did with the Woman?

 
I think I agree with you, Besely.  There's something big going on, something where it must appear that Mycroft and associates are working with and/or condoning whatever it is CAM and his associates are doing and need to keep it very quiet.  OR it could it be that everything about CAM on the surface appears rosy and his publications are all rah, rah, pro-government or whatever it is that is needed by certain political parties and he's pulled the wool over everyone's eyes (except eventually Sherlock).  But we've had a glimpse of CAMs secret lair at the end of TEH, haven't we.  It's downright creepy. He's slime and he's got something on Mary for sure. Uh oh.....

I can only speak for myself, I selfishly hoped she was going to!

Ooh.