I'd say you're just going to have to wait for the patch to come out. As of now it looks like gladiator gear is concentrated at the Immortal Flames, but we don't know if they are going to keep with that exclusion into the new patch. Just do what I'm going to do: wait a day or two after the update for people to post all the info, then make an educated decision off of that information.

But yes, you *might* be pidgeonheld into the Immortal Flames if you want all the best Glad Grand Company gear.