...Although Moffat's being vague about what this constitutes so I envisage a host of "Moffat lies!" and "It'll be 65 minutes long" comments.
He does say "well over an hour" which could mean anything I guess. I suspect it'll run to around 75, which seems perfectly fine to me for two (three?) doctors given five Doctors only got 90
A few tidbits about the regeneration as well.