No I am not suggesting, you have assumed.
However, I have reliably been told, that they need and want to improve the Chimpanzee exhibit and that this will be done using the area of the Giraffe exhibit, and that in order to do the Congolese Section, and demolish the Tropical Realm, they need to relocate the chimps into a new exhibit as there is nowhere for them at holding, but all the other species in these areas can move to holding.
The pair of Bongo, and group of Sitatunga are already over on holding.
But the plan is to convert the Giraffe exhibit into a new Chimpanzee island BEFORE they can start the main Congolese section.