Not criticism, more inspired by what I'm seeing, as this thing has more than enough going on, plus I'm not sure where licensed legally, a line is drawn between a diorama and a playset?
The garage exit for the Batmobile leads towards the back (I imagine for most would be non functional dead space as it leads up against the wall and/or cabinet), and doesn't mater if it opens or not.
Yet I can't help but a imagine if the Batmobile exit couldn't be placed leading towards the side (see final pic), that could be repurposed for a
functioning garage door and ramp, maybe a hint of a waterfall, for the clasic Batmobile role out scene, everyone likes to imagine.
Seems there could easily be room for it and a simple added role out ramp, (either way given the choice of room to display opening door or not), for those who can, would make a great added feature.
Another essential visual narrative element (for me) in any Batcave, I see there is an elevator shaft, suggesting where they arrive into the Batcave from the implied Manor above.
Yet maybe to further visually connect the two worlds he inhabits, in a location to slightly break up the otherwise all cave and rock panorama, could contain hints of the (foundation) of the building above, some gothic architecture elements, referencing what we imagine above.
It's a slight visual detail, which would really add to the over all narrative themeing.
Again this is not criticism, this thing is already beyond substantial, more inspired by what I'm looking at.