All I have to say is. BTAS.
Thats what I want to see. I want the cave to still be rough, but to have little bits of modernized stuff in the corners. I want the giant computer, but for it to be surrounded by rock. I want stone stairs leading down. I want a vault, but it shouldn't be all nice and steely shiney, it should just be a servicable vault, kind of set against the rock. I want it to be lit from lights, but not by great huge halogen lights, dim is cool.
I'm talking TAS before the "Gotham Knights" era.
Oh yeah, and a turntable and a ramp leading out of the cave for the Tumbler, cuz thats just pointless to have him jumping in and out of the waterfall.
I mean, think of the RUST!