Every single page of the Crimson Slaughter Codex: Chaos Space Marines supplement we can see by now.
Courtesy of JohnnyHorse
Courtesy of ScarMiniatureMadness
Courtesy of Skrall
Chapter Master Caius Calderon of the Crimson Lords (needs basing, but otherwise finished). Constructed out of a Sternguard head, the body and arms of the Games Day boarding marine exclusive from Forge World, and a cobbled together MK III pack.