Do you think there will be a fourth season of our dearly Sherlock Holmes???  Dreaming is free so let's fantasize about a fourth season.

My idea:  Although Watson is married ( since he would probably get married in season 3), he will have an affair with a young woman called Ana. She will pretend to be in love with Watson  but her real aim is to kill Sherlock  in order to take revenge for Moriarty' death. It's supposed  that Ana is a hard fan of dectective stories and specially its killers.  
Despite her strong desire to see Sherlock dead, she ends up falling in love with Sherlock and refuses to kill him.
However, Mrs Irene Adler, who is in danger, comes back to seek shelter at Sherlock's place.This situation makes Ana wake up from her love forSherlock and she realises that she still feels strong enough to achieve his aim ( to kill Sherlock). When Ana is about to kill him, Irene Adler pushes, hits and murders her. Sherlock's chances to know what a relationship is like finishes completely since he has just lost his two most important women.

Maybe this plot is too much dramatic and it probably has nothing to do with Sherlock, but I'd love to see more hard feelings in this TV drama. One of my favourites episodes is when Irene Adlers appears on it , so in my opinion there should be more love in Sherlock tv show, or a little bit more at least. 

Ok, now it's your turn. What do you think it could happen in the fourth season?