Back in December, Dark Souls 2 producer Takeshi Miyazoe was fairly clear that the title would not have/need DLC - "we want to deliver a full game, the full experience, to fans who purchase the package from day one.".
That's what he said at the time, alongside the following; "We did do additional content for Dark Souls, but generally downloadable content for Dark Souls 2 is not really being considered. Buy the package and you'll get the full experience, and you'll have as much fun as anybody else. Spending a couple dollars on certain items does not help the experience. So no free-to-play yet!"
It seems as though he's had a change of tune, though. He recently told OXM that "There is definitely potential, I think. Again, it's all about fan feedback. Right now we are concentrating on completing what we've got, but I think there are next steps on how we can expand on Dark Souls 2
So no guarantees there, but do check back for more info as it unfolds!