If you click the link above you'll see what I mean. It appears that the Word Bearers' legion (along with several warbands and daemons) is about to launch a devastating attack on Ultramar to finish (in their eyes) what should have been finished on Calth 10 millenia ago. The campaign is going to be divided across the world in a series of TT games to celebrate Dan Abnett's new HH novel 'Know no fear' (Release in March 2012).
So if this is going to be made Canon, Will it be set in the late M41? Who's going to lead the Chaos army? Will Lorgar come out of his temple and lead the invasion? Could this be the end for Marneus Calgar? Will Ultramar shatter and fall? Will the Ultramarines make a miracle breakthrough and utterly destroy the word bearers, save for a few scattered warbands? Is the end for the (supposedly) greatest of all chapters?
Which side will prevail?
I'm no TT player but I am intrigued. Hopefully more info will come.