It seems that some of the DLCs have also included scenerios that were based on some of the more popular ones from Civ III:
Namely the Ancient Wonder scenerio & the one included with Spain & Incas.
So going this route, they are bound to make something like Rise of Rome & Fall of Rome in some future DLC.
Also if they want to do something "big", in addition to SDK, they could add a second leader to some of the civs, sharing the same UU & UB but having a different UA. For really big they could even add an advanced option where any leader can go to any civ.
Namely the Ancient Wonder scenerio & the one included with Spain & Incas.
So going this route, they are bound to make something like Rise of Rome & Fall of Rome in some future DLC.
Also if they want to do something "big", in addition to SDK, they could add a second leader to some of the civs, sharing the same UU & UB but having a different UA. For really big they could even add an advanced option where any leader can go to any civ.