So, I keep a track on other things that Fantasy Flight releases, and given their rapid release of the first expansion for this game, as well as the Wave 4 and Wave 5 ships for X Wing this year, in addition to their two epic ships, Imperial Aces and Rebel Aces expansions for X-wing, I think we might see at least one more set of race expansions for Disk Wars, or if my original theory is correct, they might push for two in Quarter 3, and the last two in Quarter 4, which would allow them to look into things such as Tomb Kings, Ogre Kingdoms, Beastmen, what have you or doing something similar to what they have, and next year release a box expansion that has a two race focus, such as High Elves/Empire units, with Lizardmen, Wood Elves, Dwarves getting the one regiment treatment, to allow them to expand the army lists without going the 10 dollar a race small box expansion for 1 hero, 1 large, 2 medium, 3 small option, which really doesn't fit here.
Individual race expansions may work if they are small boxes that are High Elves or whatever else race wise, paying 15 for one specific race but it would have 2-3 heroes, 2 large, 3-4 medium, 5-6 small disks.