Heres my prediction. Batista is going to end up in a situation that makes us all think here it comes, Batistas inevitable death, probably not at Dexters hands but somehow getting entangled with the other serial killers, or Harrison. But then out of nowhere Masuka and Quinn show up and bail Batista out, and we learn that Batista did loop them in off screen just beforehand to fake out the audience. Batista survives, and now Masuka and Quinn are aware of Dexter as the BHB. The season ends with Dexter leaving New York, on the run, amidst the start of a nationwide manhunt for him.