It seems that now we have very much everything we need to know from image leaks originating from this weekend's White Dwarf. There is lots of information here, releases, Karanak, Skulltaker, stats, and more. The more I see of the new Bloodthirster kit, the more I like it.
Head on over and check out Blog for the Blood God, where you will find most of what you need.
there are also some pics here