The developers have stated that Dark Souls 2 is going to be exclusive to the current generation of consoles.
From Software confirmed the news earlier today, amidst the rumours that the game would see release on both this generation and next-gen consoles. It also seems that they did consider releasing the games on the PS4 and whatever-the-next-Xbox-is-called, but had to drop the idea.
We understand that the next-gen’s coming out and it would be a lie to say we didn’t consider it at all, but right now there’s no attempt to put Dark Souls 2 on the next-gen. We feel the current-gen’s potential is still viable and we want to deliver Dark Souls 2 on current-gen.
Yui Tanimura from From Software confirmed this when talking to VideoGamer.com recently.
What the developers want to do is push the Xbox 360 and PS3 to actually use their full potential. There are also plans to fix a couple of problems with the original game, so that those complaints don’t carry over to this new game and engine.