The title is a bit of a misnomer, but I couldn't resist it. I like how in 1vsAI games you start with two weaker Sovereigns instead of one really strong one. I hope this is a feature that makes it into single player games as well. It adds a nice variation. I know this is probably asking too much, but it'd be cool if you could do the dual Sovereign thing in the character creator too. With the creation points spread out between the two Sovereigns.
Later,
LAR