Yeah hey - while messing around with a mod that makes you able to play as any and all factions I stumbled upon something that I've never seen before....if you do into the Activision/Rome-Total War/Data/world/maps/campaign you find two files...one being the imperial campaign data that is the main game and another file called sons_of_mars that contains much of the same kind of stuff in the imperial_campaign folder.
What is Sons of Mars? Does anyone know?
Likely a game mode that was never inputed, there are many such examples, such as units which were never added, yet models and textures exist for them.
I actually figured it out like 2 days after I posted this...it's the new offical name of the Prolouge that I guess came with one of the latest patches for the game...I just remember the early version of the game where it wouldnt let you play the Imperial Campaign until you did the Prolouge and when you clicked it it would start right away...now if you click the Prolouge it will come up with a menu and description and little map, etc etc about what the Prolouge is...I havnt played it so I dont know if its different from the original or not.