It can be great if we have in Widelands new and unplayable race, called pirates. Pirates living on the sea, but sometimes must arrived to pirate tavern. Player can conquer it to give pirates some new quest/task(for gold), like example attack to player enemy. Player will also gets some bonus for any pirates tavern he have. Any time he can destroy(burn tavern) to gets many bonus, but pirates will be angry.
We can add new game mode, where player should defense settlement before pirates.