It appears the success of the Dark Eldar may indeed be the Grey Knights undoing. It appears that they might be pushed back in order to get more Dark Eldar models out. It's a sad day on the Grey Knight front.
It also seems we are getting a little news on the rumor front as well. This might help ease the sad news.
Here is the post by Stickmonkey over on warseer.
Nothing positive here...
My sources are saying GK may be much later this year. Sources say that because the DE release was so successful, that's why we are seeing a shuffling to get more DE models out sooner. More a financial decision than production from what I'm hearing. Hope it's not true.
And now for something new,
On the Tau front, sources say ethereals will have a much bigger presence on the battle field and new roles to fill.
On the necron front, sources say the dead will rise when the souls come out to play this year.
On the SM front, Woe be the small pale man who ignores the ides of march, especially when they come early.
On the sisters front, women in armor move slower than men, but they look better doing it. Sisters like their rides.