Harry Potter director David Yates announced last November that he was working on a big-screen adaptation which would not follow the TV series, but the project was soon thrown into doubt.
Moffat later denied that such a movie would ever actually be produced, describing Yates's announcement as "some weird fantasy".
The showrunner recently spoke to Vulture about the upcoming holiday special 'The Snowmen' and also touched on the likelihood of a feature film about The Doctor.
"The thing that I would find intolerable is that you get a film instead of the TV series because the TV series is more important," he explained.
He continued: "I don't think any showrunner or future showrunner of Doctor Who would tolerate the idea that David Yates was talking about, of rebooting it and having a second continuity.
"That's just nonsense. Absolutely insane and a straightforward insult to the audience. We'd never, ever do that. The question would be how could we do it without delaying or harming the TV show?"
Moffat went on to say that he does see the upside of a movie continuation as long as it doesn't negatively affect the television series.
"I think it could be incredibly exciting to see that TARDIS fly on the big screen. It would just be how do we arrange it?" he said.
"And how do we make sure we have... no offence, but you suddenly take American money and they expect to tell you what to do and all that. I wouldn't be happy with that. But it will happen someday, I'm reasonably confident."
Doctor Who's next television instalment is 'The Snowmen', which features The Doctor and new companion Clara facing killer snow.
Moffat recently hinted to Digital Spy that the episode will feature The Doctor in a "misery" mood as he contemplates his role in the universe.
'The Snowmen' will air on December 25 at 5.15pm on BBC One in the UK and at 9/8c on BBC America in the US.
Watch Steven Moffat speak with Digital Spy below: