That's a great resource. I'm already thinking of ideas to incorporate the pig myth.
Maybe when a first player plays a siege or cathars tile on an incomplete city, another player who owns the city can gift their pig meeple to the first player. The first player then effectively has two pig meeples, and the other player can immediately discard the siege tile, along with any followers on it, off of the board and start his next turn.
I'd also like to incorporate the renaissance into an expansion and have Da Vinci followers doing cool stuff. Not sure what stuff they'll be doing yet.