One open game that came to mind really grabbed my attention because it was impossible. I love impossible.
Open a Pretender/Disciples game. Allow players to choose the nation they will be the Pretender for. All of the nations will accept a Pretender god.
When someone hits the START button then all of the Pretender gods get two computer-player Disciple pretenders from the unchosen nations on their team.
I am pretty sure I can make this happen.
