The Gloriana Class isn't represented in game, but it's mentioned in 'Betrayer' to be the class that most Legion Flagships come under. As I said, it can be used in game as an Emperor or Retribution Class, as I couldn't decide which one to field. Now I don't have to, as it's got enough battery's and launch bays for both.
I think it looks quite magnificent. A vessel worthy of the XVIth Legion! I'm rather looking forward to getting it painted too.