Its hard to read the text, but I was able to make out a few things. A Madagascar exhibit (lemurs), penguins, a lagoon exhibit and at least two walkthrough aviaries were all planned at some point.
@The Speeding Carnotaurus This was going to take up the entire southwest corner of the zoo. Basically this would stretch over space currently occupied by The Living Coast, Feather and Scales, Reptiles and Birds, The Formal Pool, the old Reptile House and the new Nature Plaza. You can see the outline of Tropic World at the top right portion of this plan.