The reveal came in a new trailer for the latest entry in the RPG series.
Divinity: Original Sin goes back to the values of memorable cRPGs: isometric, party-based, turn-based, gripping dialogues, choices and consequence, deep story, profound character and party development, a big interactive world filled with characters and items, free exploration... There is only one main goal, and how you get there is completely up to you. Of course, everything is more fun with a friend and so is Original Sin: drop-in, drop-out multiplayer takes care of that, both online and locally.
They say the delay is being made to better incorporate Steam Early Access feedback and backer feedback.