Okay, you heard it here first, the Renegade Carpark prediction on who is gonna snuff it in the last episode.
The Dead Pool says: LeStrade.
The running gag about Sherlock getting his first name wrong is the key. At some point, LeStrade will bump into Sherlock who will call him by his correct first name. LeStrade will reply:
'Blimey, you called me Greg'
And then whack-a-boom! Greg's dead baby. Possible cliff hanger, it looks like Sherlock has murdered LeStrade.
Prediction over, returning control of this body to user.