Are you referring to releasing the entire game again, only with the DLC in it? Because if you are, Saelune is correct: it already happened a while back. There was no big announcement or anything, but it is out there in the wild now.
If you mean, "Change some of the lore and the world to make the story work better", I say not a chance. FROM Soft has made it pretty clear that they're done (or taking a long break) from Dark Souls, and I don't think they want to put the effort in to tweaking a game that they're done with.
Also, Scholar came about because Dark Souls II story was a bit...spotty. And I think that, after they released all the DLC and built more lore for their game, the team went, "You know what? We can do better. Let's get back in there and fix some of this stuff."