It will involve a player with the titular role of Popemaker. It will also allow for the possibility of the creation of Antipopes by an as-yet-unidentified mechanism.
I invented the game (with CES) and Oman only claimed it once he found out that I already had the idea (the name of which he came up with indepentently much later). However, he's put no description of what the game would be like as of this post, meaning he cannot claim it as per the rules for claiming an idea.
In case he changes it, this is what Oman's post looked like at the time of this posting:
Oman wrote:NOW CLAIMING MY OWN IDEA:POPEMAKER