In this month's DWM (out now) Steven Moffat had quite a lot to say about next years Series 7.
"I'm back at work and I've started on Epiosde 1. Other writers are out there writing. It really is a chance for us to get several scripts - quite a few scripts, I'd say - in place before we get anywhere near actually filming. We're making more episodes than ever before, we've got other things planned for the big year [2013, the show's 50th anniversary]."
"The big thing is, nothing in the next run is starting out as a two-parter. At this stage, everything is a single episode, and the only reason anything will become a two-parter is if we think it needs to be; not so much that the story is too long for 45 minutes, but if it feels as though there are two distinct stages to the story. I was looking at the facts and stats, and it's not true that the two-parters save us money. We've assumed it for years. They don't save us money at all. Not a penny. So what's the point in them? I want to be able to say, every week, we've got a big standalone blockbuster, and then a trailer that makes it look like nothing compared to what's going to happen next week! That's the form next year."
"I want slutty titles and movie-poster plots. I want big pictures and strap lines. The first episode I'm writing is called [Spoiler] of the [Spoilers]! And it feels a bit like Die Hard, that first episode. Everyone is expecting us to do another year like 2011. You're not going to get that at all. You're going to get the biggest, maddest set of episodes ever."