It depends how they do it. Creating a new order for races would take a fair amount of work to do. But it can be as simple as opening up the ranks to more members with only a racial mount being needed.
Ideally I'd like to see the order be a choice after character creation. Sort of like Covenants where a Paladin can pick between a few different orders and change it around if they wanted to. Instead of racial mounts they would have order-based mounts. The lore already supports this as the Order of the Silver hand can "disable" a persons ability to use their orders spells when kicking them out but can't stop them from drawing on the light.
It would be cool if they could extend that to all of the classes as well to offer more variation in lore for different races/cultures. A diet version of Legion Order Halls that allow for a little class based stories each expansion and occasionally stuff like green fire for warlocks or the Shaman WoD set.