It's hard to tell, but I get the feeling that this game is going to have similar play style to the older game called "Myth" (and Myth 2)
Basic idea is that each side gets x number of points to spend on different units, and then you battle it out until the arena is won. Obviously this would have the added feature of the "demigod" (akin to Warlord Battlecry's hero).
Am I about right on that? I sure hope so!