At first- these are not official infos, they came from official forum of WItcher, but there were deleted immediately.
May contain spoilers:
- Expansion requires at last lev 40 and we can start it befor or after completing WItcher 3: Wild Hunt
-Important to story Broderhood of the Wolfs will appear
-There will be 3 different endings- one secret, which can be unlocked by completing certain events in expansion
-The will appear "Bone Sword" which will be connected to Broderhood
-There will appear NPC, whose armor will change colours
-Developers created 4 new abilities for Combat/Signs/Alchemy (12 in all), 3 slots for skills and one for mutagen
-Map is still growing at currently is aobut 75% of Novigrad/Velen
-New animations for combat
-Some changes in gameplay balance
-Developers created some unique bosses and final one will be the toughest in history of Witcher saga
-New location (Toussaint) is most spectacular place ever and developers used some special technology
- New camera settings
-Developers are working on gameplay in FIRST PERSON!!!!!!
-Expansion should be released around June
