Dark Souls II could come to PS4 and Xbox One in future, though the developer hasn't "put any thought into this yet".
The ambiguous answer comes from co-director Yui Tanimura, who told Edge that while such a thing may very well come to pass, no firm decision had been made either way.
Elsewhere in the interview, he explained that the decision to focus on the older consoles was made because the team felt a lot of potential remained there, and doing so would enable the studio to "deliver the game to fans as soon as possible."
Come on From, we know It's happening!
Source [IGN] :
EDIT: Now featuring DemonNite's Gif just for pleasure.