LOOK at previous two preorders, the Warriors of Chaos and Norsca.
They have been almost ignored for the all of game one and two. They are not fun to play and unlikely to see any future love because they are now considered a DLC.
Neither of them can even be played in Vortex, they only exist in Mortal Empires.
Would you really want to see that fate for a race you like?
Would you like to see Orges introduced poorly and then ignored for the rest of the game? or the Chaos Dwarfs?
Going on the past, i do not want any race i like being introduced as a preorder.
Maybe a good opportunity for the Dogs of war?