I think it would be cool if For Honor had a gladiator faction with roman Arena type setting and everything that goes with that.
Gladiator will need a name change and move of faction but the weapons used in the arena vary drastically so there is a lot of room for creativity.
Just an idea, you can thank me later
Spartacus was a good TV series and the film, Gladiator, was a classic so I wouldn't say no to that. Yes, there's plenty of armour and weapon variation for it. The varied arena maps would be cool and there's plenty of storytelling potential too.
The Romans should have their own faction as well which would suit the Centurion nicely. The game needs the Roman shield.
I've always felt that both Gladiator and Centurion were out of place in the Knight faction. Each should have their own. Their uniqueness, culture, mythology, and especially history justifies it.