I had previously suggested that Binturongs would be a good fit for the former leopard exhibit, but they can also work in the former otter exhibit as well if they install climbing structures.
Though I am not sure if Giant Salamanders would be a good fit here; I feel like you would almost never see them since there is no underwater viewing. I feel like they would be better suited for World of Reptiles, but they already have Hellbenders. But then again, so does North Carolina, and that isn't stopping them from maybe getting Giant Salamanders for their new Asia section. So who knows?
The Tapir exhibit can already also be accessed by the gibbons, the fruit bats, and the dozen+ species of free-flying birds that inhabit that section of JungleWorld. The Tapirs don't need another terrestrial ungulate clogging up the space.
Look, I would love for these rare primates to return to US zoos as much as the next guy, but sadly, it's not happening barring a miracle.