In all likelihood, you probably have heard, at the very least, rumblings about some newly datamined Battle for Azeroth dialog pertaining to the Mag'har Orcs.
I really do love the details on the Allied Race Heritage Armor.
Battle for Azeroth will feature at least eight new Allied Races — four of which you have access to as soon as you pre-order the expansion, and another four that will be released during the expansion itself.
Battle for Azeroth will be getting an additional two new Allied Races, one we already knew about and one we hoped would come.
We're still seeing more Allied Race information on the alpha thanks to the tireless efforts of dataminers like the folks at Wowhead.