Well, that depends on how you interpret what Steven Moffat has had to say on the topic.
At this year’s Edinburgh International Television Festival, Moffat was asked if he was “grooming somebody else to take over” in the future.
Moffat replied: “Am I grooming people? I didn’t expect it to go so dark.”
Then he was asked: “Are you just making sure everyone else is a little bit shit so you look good?”