I do believe the man who shows up "Lucypher" is supposed to be Luther of The Dark Angels. The Dark Angel who fell to chaos and caused their Homeworld to blow up. He disappeared not being confirmed Killed so all in all it's not a bad setup if that is the case.
I have to disagree.
Luther is locked down really really deep in the Roc (the Dark Angels giant space fortress, for those who don't know).
So considering the cape, the sword, and the mistery around the guy. He can possibly be only one Fallen.
The Fallen who shows up anywhere, anytime, and rapidly other Fallens come around.
The one supposed to carry the sword of the Lion himself.
The one who's the best hope and the worst nightmare of the Dark Angels: Cypher.
Re Reading the serious right now i realise this is by far you best story point in this already greate read. i just fucking love this comic, even tho Johnson is just a pesky Lion and no Glorious Wolf. ;-)