From their website:
Get ready to make your mark on Western Immoren. Download the Shattered Grounds league rules and Nightfall specific rules pdfs below and be sure to check out No Quarter #29 for a first look at the Nightfall Season Model stat cards that detail the specific forces fighting on the Isle of Garlghast. The Nightfall Season Model stat cards will be available to download April 5th from www.privateerpress.com/nightfall.
The first Shattered Grounds league, Nightfall, begins April 5th 2010. Talk to your store today about running Shattered Grounds: Nightfall in your area today.