Speculation has been rife that a film version of Time Lord's exploits is to be made, with a recent survey showing that TV fans would prefer a Who movie over any other TV adaptation.
Davies claimed that he thinks the BBC will get around to greenlighting the project "some day", although at the moment the corporation is at its "absolute limit".
"I'd be very interested in going back for it. I think it could be lovely and could work as an idea. They did one in the 1960s and that worked and it didn't affect the TV series at all," he said.
The showrunner announced in May that he would be leaving the show before the next series of the sci-fi hit, with Steven Moffat taking over.
He said: "It's been a delight and an honour working with Steven, and I can't wait to see where his extraordinary imagination takes The Doctor. Best of all, I get to be a viewer again, watching on a Saturday night!"