
TYWKIWDBI directs our attention to the 
ultimate, extended Monopoly board—which was apparently prototyped, with the 
rules of play laid out here but was never put into production due to (
ironically) copyright issues.  The discussion at the source thread is a pretty interesting one on how most game play is conducted according to house-rules and most never bother with the formal instructions.  Would you like to play this 
Inception-version of the game?  Maybe an enterprising designer could pull it off and successfully pitch it to the company.