My thoughts too.
What better way to show the strength of nature (rather than a man-made idea of what nature will do to re-claim the land)?
BTW, I suspect this is a man-made lake and island??
There used to be a show on about how nature would take over once the people were gone (computer models). I’m guessing Disney wouldn’t want to take the risk, but they could have college kids study the places over time.
Heck - Disney could do their OWN show.
I just checked at a website, World of Walt, for Bay Lake and Adventure Island. The lake and the island are natural features. The idea was to use it for half-day excursions as an escape from the hectic environment of Disneyworld, but the idea never took hold.