And I don't think Moffat's ever been too concerned with squashing rumours like that.
That's pretty much what I've figured after it became clear that this year we were actually going to get fewer episodes than we've had in a very long time. It's just...I dunno. You sort of expect something a little bigger for the anniversary. I mean, yeah, there's all the miscellaneous stuff released, but the TV show is the big big draw. S'why I'm hoping the anniversary special actually manages to bring together some old doctors. I don't think anything has been announced regarding that special other than its existence. (with all the usual "it's going to be a historic event" PR fluff)