The only way I can think of how to do that is by making it ambush style combat like they showed in the tutorial video.
This doesn't quite entail my scenario. I want to make a situation where player enters a house, and it starts in TB mode without AI or ENEMIES shown, slowly as player walks through the house, explores things happen and eventually enemies appear (ie, they storm in). Mainly I want to do this because otherwise, I have to indeed make enemies spawn out of nowhere.. it would otherwise allow players to cheat the combat like they can in D:OS (ie, by attacking from sight boundaries)
Bit stumped how to do this without teleporting enemies around like the tutorial.