Ya know, I honestly wouldn't see that being too far out of what the original show might of done on a more experimental episode, maybe a few tweaks here and there, namely how they get into the simulation in the first place. like "Hey, this simulation of the past is being powered by a fragment of my old power, let's go in there and take it back; so sombras tower loses power and we can access another place in the tower!" or something along those lines, I could see it honestly working with a few changes, the base isn't un-salvageable, could be reused for something else.