Moffat- "We're making a full series of 12 episodes and a Christmas special next year."
He explicitly says that when it goes out is not his decision (that'll be early 2017, then), but at least we know that we aren't being fobbed off with specials or a half season instead.
To an extent this is bollocks, though, and dodging. The BBC want 13 episodes of Doctor Who a year - in fact, they wanted 14, but Moffat's team proved unable to deliver year-after-year, so finally, they dropped an episode.
The fact is, if the rumours are true - and this all seems like posturing to prepare for that getting out - the reason there won't be a full series next year is because Moffat and Capaldi both want some time and breathing room to do other things. I think that's fine, but let's not pretend that's on the BBC and not on them.
So they're filming 13 episodes next year; the same way they filmed 15 episodes during 2012, but then spread them out among 2012 and 2013 and then dropped two extra ones at the end of the year, filmed much later. I feel like "I don't decide when they go out," is really disingenuous a thing to say on Moffat's part, because while it's true on a granular level (time slot is, as their comments prove, out of their control), broadly speaking he and his team hold all the control, and this has always been the case. The BBC wanted The Waters of Mars as a Summer special; RTD and Gardner wanted to make the episode scary and dark, and wanted the weather to match, and so the BBC relented and it got bumped to Halloween. The entire Series 7 split was masterminded by Moffat and the entire series structure was built around it; he negotiated that out with them, and I'm sure is and has done the same for whatever comes next. This is the man who last year blew his own trumpet about how he'd shifted the series back into the Winter months and it was better there.
TLDR: The concept that they just film 13 episodes and the BBC might decide to air half in 2017 without them having a say is bollocks, and I think he's taking the piss by suggesting it in the interview really. I know he doesn't want to be 'blamed' for a lack of Doctor Who, or worse have Sherlock come under fire for it, but he's just talking shite.