We have managed to dig up three unreleased CityVille buildings, most likely upcoming community buildings: the CityVille Baseball Park, Prison and Bus Station. Here are all these new items in images:
For some reason, I have never thought about a prison in CityVille, and the idea sounds great. However, since these items are not yet released, we have no confirmation that they will actually see daylight in the game.
Would you like to see any of these unreleased CityVille buildings released with the next game update?