Okay, so in trying to Incorporate the Eternal Crusader into the ASC 2.0, I am having to use my knowledge of BFG and Fluff that unfortunately it seems Black Library Authors and some Artists have a disregard for. Now I know I am not the "keeper of the fluff", but most BL authors don't bother to do their due diligence. Hell, there is even a HH book where Sanguinius had Black Hair! So expecting them to have any concept of things like the Gareox Perogative or just the evolution of ship design is a lost cause (unless it is Gordon Rennie).
So the issue is The Iron Blood. A few things:
1- It says it was built by Pertarabo himself over Olympia as the first of the class, even though there were only 20 Glorianas made, all by Mars.
2- It is obviously an enlarged Space Marine Battle Barge. However, no other Gloriana has ever appeared to be similar AND the Space Marine Battlebarge design is a consequence of the Horus Heresy, as it is designed with Planetary Assault in mind rather than naval conflict, since the space marines were forbidden from having a true navy in the wake of the heresy (so the Infidous Imperator in Macragge's Honour is an impossibility, since battlebarges of that sytle did not exist yet).
3- Every other Gloriana appears to be much more stylistically similar to Imperial Navy Battleships.
Next was the Eternal Crusader, which is floating around on a bunch of sites and scale diagrams. However, this design (though by a good digital artist) is
1- REALLY WEIRD
2- Does not match the rules or fluff as released by game workshop in Fanatic Magazine.
http://www.specialist-arms.com/fanatic/90btf.pdf3- Is actually a tragedy of scale, as the artist herself claims the weird "Kuato" ship on the underside is supposedly the first 2 kilometers of an Emperor Battleship. However that would make the Battle barge truly MASSIVE which comparatively it is not.
So my solution- Reject the design of the Iron Blood as a Gloriana. It just doesn't fit the established fluff, and it was pictured next to that weird "Tribune" thing too. Basically it is a "Sangunius had Black Hair" moment as done by a good, yet wrong digital artist. Just like the Eternal Crusader. Whose design I am also going to reject. HOWEVER the Iron Blood is PERFECT for the Eternal Crusader, as it matches fluff and rules so long as we assume the vessel pictured is not 20 KM (which it isn't since the cobra show for scale is 800m, and that vessel is not 25 times longer) , and as such shall take its place.
As for what a Gloriana should look like, best representation would be the Graphic Novel Macragges honour, even though they have a SM BB in there for the Word Bearers...