The latest Warscrolls are out now showing the latest Warscroll rules for this week's releases. Additionally you can see the latest on the Horus Heresy and what is new from the Black Library, which includes new work for Warzone Fenris.
Here is the latest leaks on what is coming from Games Workshop
via Captain Citadel on the Bols Lounge
You can see the rest or everything in one place here on MiniWars