Grinding Gear Games has a forum post for Path of Exile with more information on the Mini-Expansion Sacrifice of the Vaal. They also released the first trailer.
More information.When we released Path of Exile in October, we promised a major content update (a mini-expansion) every four months. Sacrifice of the Vaal is our first such major update, and will be released on March 5 as a free update to the game.
While this article is not the full patch notes, it covers most of the major new content and features of Sacrifice of the Vaal:
- Atziri, Queen of the Vaal
- Secret Corrupted Areas
- Vaal Skill Gems
- The Vaal Orb: Corrupted Items
- New Challenge Leagues
- Ambush League
- Invasion League
- New Boss Monsters
- New PvP Modes - Cut-throat and Sarn Arena
- Launch Week Competition
- Deployment Timeline