Hi guys! I've whipped together a little app that will randomize the opponents you face when creating a new world. You'll still have to choose the number of opponents you want to face, but they should be random if you use this.
Currently you have to run this app before Elemental, each time before creating a new world that you want the opponents randomized (otherwise the game will just remember your last selections).
You can also add in any of your custom factions, by putting the internal name of the faction in the appropriate box in the application.
Make sure you select your Prefs.ini file correctly when using this app (usually found in MyDocuments\MyGames\Elemental directory).
Enjoy! Let me know if you need help or something doesn't work.
http://www.gamemodshosting.com/showfile-85/randomopponents.zip
Update 1.1 - Added ability to change number of opponents from application.