I think the idea of having an entire themed land dedicated to mystical creatures has been kinda nullified by the existence of Expedition Everest.
I think an interesting idea of ressurecting BK that's more fitting at this point is to essentially create a "Europe" themed area. Model it after Africa and Asia and have it take place in a fictional European village. Have a nature trail containing various flora and fauna from Europe, and have it end with an encounter with a Unicorn AA in a hidden grotto, just as it was intended back in BK. And of course, ressurect the Dragon Tower concept as the new land's signature attraction.
None of this will ever happen of course, due to lacking a big name IP attached to it. Which has, for better or worse, become the norm for Orlando theme parks.