Witcher 3's official Facebook page let the cat out of the bag as to what the final round of Free DLC is coming to Geralt's adventures.
The most intriquing is New Game+ mode. This (obviously) allows you to replay the game again with everything you have intact. The bad news? It isn't ready to drop yet. The team were quoted as saying "we're just finishing the (final) details".
We could be waiting a while, but boy is it worth it. Some people have logged over 150+ hours on Projekt Red's immense RPG.