Rumors via Faeit. Image via this doo-hickey. After the break.
The bad boys are back. The Black Legion baby.
Black Legion: A Codex: Chaos Space Marine Supplement is in the August White Dwarf under digital releases.
Listed is
Definitive Background for the Black Legion
Detailed Timeline of major historical battles and events
Additional rules (to lead your forces in a Black Crusade)
Miniatures Gallery
Reference for special rules and Wargear