It’s linked on their official site
[Update: Yep, it’s confirmed, with a “see you at E3” message.]
In the documentation we have so far, Massive Entertainment is back for the sequel, as well as a “close collaboration with Ubisoft Annecy, Redstorm, Reflections, Ubisoft Bucharest and Ubisoft Shanghai.” It’ll supposedly use an “updated” rendition of the Snowdrop Engine, and the original game will continue with two additional title updates, as well as an Xbox One X update for 4K visuals.
Tom Clancy’s The Division originally launched back in March of 2016 with a rocky start, and has been steadily updated ever since. An official “state of the game update” is coming in mere moments, and we’ll update you if we hear more.