Prince of Thieves
So, I am absolutely digging Corsair Cove. I haven't played any of the Anno games, but I have played Timerborn, and there's certainly a few similarities (though fewer beavers).
But I was thinking - my pirate settlement reminds me a lot of the Sherwood Forest camp in Robin Hood: Prince of Thieves, with crazy ladders going everywhere. I was thinking that if Limbic needed a subject for their next game, Robin Hood might be a lot of fun - sending your Merry Men out to rob the rich, deciding how much to give back to the poor, gradually assembling commanders from among the legendary characters (Little John, Friar Tuck, Will Scarlett, etc.). You could even expand the card-based combat to actually have some dueling or an archery mini-game.
Just a thought.