Ok, so here's just speculations about the release date. We can only asume that this will be avaliable in July 2011.
To this day we only saw this:
And form the description we can gues that also we will see: Spelleater Rune (D), Helstorm Rocket Battery (E), Forest Dragon (Neutral Order Only). And from the box cover - that there will be Squig Raiders (I don't remeber now the official Warhammer name for those).