Originally Posted by listopencil
I just rewatched that episode last night. As far as I know it's a loose thread still hanging. She came back from the dead but didn't change form, and she did this while a mysterious terraforming agent was at work, so (IMO) we don't know if she can regen or if she has any time lord abilities at all.
Moffat has said publicly that he's not going to touch any loose ends in the RTD era out of respect (other than ones he created himself like River Song) so I doubt we see anything like that ever again unless RTD is involved (so no Rose/10.5 etc). He actually said that he's also approach RTD to come back to do an episode or two but he declined.