Fans still have a while to wait before the return of “Sherlock” — with a special episode slated to begin filming in January and season four expected to shoot later in the year — but that hasn’t hindered the rampant speculation about what we might see when Benedict Cumberbatch and Martin Freeman finally reunite on the small screen.

In a recent interview with Britain’s Radio Times, “Sherlock” co-creator (and the actor behind the detective’s enigmatic brother Mycroft) Mark Gatiss teased, “you can always expect tragedy as well as adventure” when the critically acclaimed show returns.

Could that relate to John Watson’s new bride, Mary (Amanda Abbington), the former assassin who lured John away from 221b Baker Street in season three? As Freeman pointed out in a June interview with the UK’s Telegraph, “While we play fast and loose with the original stories, we generally follow the trajectory of what Conan Doyle did. So [Watson] gets married, and then Mary dies — so at some point presumably she’ll die.”

Still, Gatiss cautioned viewers to remember, “Just because it’s in the stories doesn’t mean it’ll happen in the series because there’s an awful lot of changes and an awful lot of places to go and things to do.” He added, “It should be clear by now that while, of course, Doyle is our absolute god, we have gone quite a long way away as well… so there are lots of surprises to come.”

But before season four hits our screens, the standalone special has to deal with the chilling cliffhanger that ended the last run of episodes: the apparent return of Jim Moriarty (Andrew Scott), who took over Britain’s TV sets with an ominous looping message of “Did you miss me?” — despite having committed suicide right in front of Sherlock in season two.

Gatiss told the Radio Times that the upcoming special will “completely” solve the mystery of Moriarty’s supposed reappearance, leaving the way clear for a new arc in season four. However, Gatiss declined to confirm or deny whether we’ll ever see the iconic villain again after the special, coyly offering, “Well, it’s very hard to put a lid on Andrew Scott…”

Do you think Moriarty is still alive? Share your predictions for the “Sherlock” special and season four below.