Future expansions.

I think the Academy should definitely have: golems, mages, and titans (although I'm not so sure about the latter). The main thing is that there shouldn't be any mechanical dragons. And about the dwarves. They could have been included, but they will appear in the second expansion pack, and even then, it's not a certainty. It's all because they don't have any real rivals. Their squabbling in the tunnels began after the appearance of the Dark Elves.