I imagine if they do Falls Lake for a theme park, they won't opt in doing the walking method and will opt to do a form of "Transport" not unlike that of a Hogwarts Express.
They do walking for HHN because it's the only way of doing it that doesn't disrupt the Terror Tram's flow. If they do it for Falls Lake, it will need to be with something that doesn't require ADA shuttles to be a constant.
Believe way back in the finalized plans of the Evolution Plan; with the exclusion of what had became Supercharged--the WoTW sets and the Psycho sets would've become for studio purposes in the light of a set of "massive" soundstages. I doubt that's the plan now, as they need to finish Park Lake's soundstages before they can do anything; but they have had inclinations to have studio adopt some of that space (atleast, when they got it approved when they did).