If you've been following the War Hounds Legion saga, you'll be aware of the sheer lack of reference material on them. They were quite a different Legion before they were reunited with their Primarch Angron, so World Eaters iconography isn't always appropriate!
The War Hounds were men of Terra, loyal to the Emperor, the Great Crusade and the Wars of Unification before that. So icons, honours and markings had to come out of brain.
Stay tuned as I hope to have this unveiled in the next day or so...