It's simple, just name a classic movie or book and add a mechanic that could be used in a game.  Other possiblities, making a sequel.

Lawrence of Arabia- Use the Wiimote to tap the camel.  (other motions could be shoving a stick up the camels  butt, pushing the switch on the explosives to blow up a Turkish train, and using a Mass Effect esque conversation system to get various Arab princes to help you).
Scarlet Letter Tycoon- Try to escape the torture of being ousted by society and deal with a lying reverend.  ALL WHILE MAKING MONEY AT THE SAME TIME!!!
The Da Vinci Code- Oh wait thats not a classic...oh and there's already a game...
The Republic 2: Electric Boogalo-  You've described the ideal state, now try to realize it in the first cooperation between the developers of Animal Crossign and Sim City EVER!!!!
Candide-  This could actually be pretty badass if it was an adventure game.  But stay true to the orignal text.