I'll post up a couple of sketches what I think it should look like and begin building one. Chime in with some thoughts.
These cool pictures have been floating around the internet too. GW have brought the Space Hulk levels of details to the new Blood Angels range. Great job GW!
Death Company with lots of great interesting details.
Assault Marines of the 2nd Company (note the yellow teardrop on the right shoulder pad signifying Company designation), with a cool special character. Note the inferno pistol held by the model in the top right of the photograph and the handguard of the chainsword held by the model in front of the Rhino.
Rumor says these are Sanguinary Guard. I can't say for certain but they certainly are some of the coolest models GW have ever made. There on tons of great details in the picture so you've got to find all the cool stuff for yourself.