Trent Reznor told Zane Lowe:

I need to commit to doing something different, and that doesn't mean I'm not going to return to that [Nine Inch Nails] at some point. But I find myself pushed and pulled back into the same routine of album, tour, album, tour, album, tour, while a list of things I'd like to try and do in life sits untouched on the table.

When asked if he intended to work as Nine Inch Nails again in the future, he replied: For sure. I plan on spending a good portion of this year coming up writing with that in mind. Let's see what happens.
http://www.nme.com/news/trent-reznor/60826