With transitions, it would be possible. There actually is a mod around that removes the world map. If you want it to be integrated seamlessly, though, the problem would not be the module system, but the engine itself. I do not think it can simulate, say 100 times the size of a normal battlefield without any lag or memory leak.
One thing is you can't save the game because when you load it again you'll have to start over
You're a miserable inbred fucktard and I hate you.
Curse you elenmmare for calling me a Fucktard!!!!!!!
The hardest would be A) getting an army, B) fighting people.You'd have to trigger it like in the Arena, say, speaking to a bandit and saying "bring it on". That'd kind of remove the whole point of no world map, because no one wants to play a game where the only way to get attacked is to speak with people.