[Archonsod]

I don't think there is a game similar to Dominions. The only thing I can see MTW and Dom3 having in common is the fact that you spend your turn moving on the strategy map, then have a battle at the end of it. But then, the same thing can be said of Rise of Nations or Cossacks 2, and both are radically different from total war.

One thing to consider though - since Shrapnel are unlikely to lower the price, it makes sense to get Dom3 now. Not only is MTWII likely to be half price in the January sales, but your likely to be able to pick it up with the inevitable expansion for less than you'll pay on day of release.