I wonder if a flash game could be created that captured enough of the Dominions spirit to convince people to download the demo?
Flash game are amazingly unique in their ability to reach an incredible large audience.  They are actually what took me away from Dominions... first for writing my own flash games.
Asteroids Revenge 
and
 
Sola Rola 
Then I/we actually formed a company FlashGameLicense.com to broker games for other developers making them 2-3X more money for their work.
A recent game we brokered has been played 4.5M times in the last two months.  Two million plays were on the 'sponsors' website.  The other 2.5M plays have brought back 500K unique visitors (20% click through ratio) to Kongregate.com.
The game is 
Protector 
If you could take some aspect of Dominions to create a compelling flash game experience you could reach a TREMENDOUS audience.  I'm certain a good percentage of them would turn into the typical rabid fan. 
