Also, it is not even confirmed as being an update - it could just be maintenance to the servers.
That said, 7 hours is a long time to take them offline, which could suggest that they are making updates to the game...but its just speculation.
Obviously releasing a DLC does not require the servers to be taken offline, so that is why people think there will be changes made to the game itself. That could be in the form of additional mission types, adding another creator type, opening the casino, adding mansions etc.
But who knows!
That said, 7 hours is a long time to take them offline, which could suggest that they are making updates to the game...but its just speculation.
Obviously releasing a DLC does not require the servers to be taken offline, so that is why people think there will be changes made to the game itself. That could be in the form of additional mission types, adding another creator type, opening the casino, adding mansions etc.
But who knows!