Here's my take, with some inspiration from
@Loxodonta Cobra
ZT2
Replace gemsbok with giant anteater
Replace musk ox with southern pudu or black bear
Replace black leopard with generic leopard or clouded leopard
Add koala, gray wolf, caribou, bison, and Komodo dragon
Honorable mentions: Maybe replace emperor penguin with king penguin
Endangered Species
Replace giant sable antelope with giant otter
Replace fennec fox with red-ruffed lemur
Replace gray wolf with dhole
Replace koala with Tasmanian devil
Replace scimitar-horned oryx with Chacoan peccary
Replace Javan rhino with Indian or Sumatran rhino
Replace wolverine with (West African) slender-snouted crocodile
Replace Komodo dragon with gharial
Replace caribou with Bactrian camel
Replace bison with Somali wild ass
Honorable mentions: Maybe replace Florida panther with Key deer, spectacled bear with dog deer
African Adventure
Replace gerenuk with gemsbok
Replace Ethiopian wolf with klipspringer
Replace striped hyena with spotted hyena
Replace Barbary ape with back and white colobus monkey
Replace caracal with serval
Add addax, scimitar-horned oryx, and fennec fox
Honorale mentions: Maybe replace Masai giraffe with foosa
Marine Mania
Replace pilot whale with harbor seal (performs in shows)
Replace false killer whale with dugong
Replace marlin with ocean sunfish
Replace scalloped hammerhead shark with a penguin species (little blue, Humboldt, or African)
Replace goblin shark with giant Pacific octopus
Honorable mentions: Maybe replace narwhal with North American river otter (maybe performs in shows)
Extinct Animals
Replace stokesosaurus with coelophysis
Replace cave lion with terror bird
Replace giant warthog with pachycephalosaurus
Replace bluebuck with protoceratops
Replace deodicurus with toxodon
Replace giant camel with plateosaurus
Replace warrah with megalania
Honorable mentions: Maybe replace mastodon with woolly mammoth and Gigantopithecus with gallimimus