We still obviously don’t know what the advancements will be on the inside, but it looks like the exterior will be updated for roadside access.
Now they just need to add a remote-controlled rail barrier in front, and no one will ever realize it’s there.
And with the Dark Knight’s official introduction finally coming as the Fox series closes out its run, Bruce can at last fill that cave with all the state-of-the-art technology that Lucius Fox can develop.
As it’s done with many elements from the Batman mythos, Gotham planted early seeds for the eventual Batcave back in the Season 1 finale, when the murky location first appeared.