Peter Davison, the Fifth Doctor has been dropping hints that the Doctor regeneration limit will be addressed very soon and that Moffat has already worked out how it will be dealt with.
Davison was quoted saying: “I know people are worried about it, but I think there will be a way around that rule. I know that Steven has put in the groundwork already in an episode so that there can be more.”
Some rumours have circulated that it will be addressed in The Day of the Doctor. It would certainly be a great way to secure the future of the show as Moffat has told fans that he is planning to do, and what better time than during the 50th anniversary.
If John Hurt’s Doctor is going to count as a true incarnation of The Doctor, it’s also something that will need to be addressed sooner rather than later.