It's not much in terms of detail but there is news coming through the gamer feedback group Elite Task Force (ETF) that was created by The Division that there will be new content.
This is apparently not revisited strikes and missions but geniunely new content across 2 large patches. Its under NDA at the moment so probably won't hear much more for a bit, unless this is the good old accidentally on purpose leak to build some hype.
Good move if its brand new content. If Ubisoft have a challenge to retain players against the likes of Bungie, Blizzard and Bethesda then regular new content is the way to go. Just really hope it is a challenging experience that is worth the re-visit.