As for African Savannah these are the species I have heard most of which have been in some rough drafts: (Note how a lot of species are similar to Herbivore/Carnivore)
African Elephant
Black Rhino (Transferred Over from Pachyderms)
Giraffe
Zebra
Giant Eland
Kudu
Gerenuk
Hippos
Nile Crocs
Lions
Cheetah
Hunting Dogs
Buffalo
Lechwe
Waterbuck
Sitatunga
Bongo
Ostrich
Vultures
Various Other Antelope and Birds (Cranes, Bustards, etc)
Say it ain't so, C-Bus! Columbus has always been one of my favorite zoos. I've been visiting since the time when they had the little walk through cave-rock thingy in the Pachyderm Building (now the elephant area) and the lion mural was hanging over the Herbivore-carnivore exhibits.
That said, I was really hoping to see some hyenas when the new savannah opens. It seems like most American zoos just don't keep them. Guess their undeserved reputation makes them less of a draw. C'mon, man. It's a huge exhibit proposal. What African savannah is complete without some hyenas?