My biggest dream for Animal Kingdom would be replacing CMM with South America. South America not only fit with animal kingdom, being able to bring in a jungle area, but would also bring in some great new character opportunities.
The new E-Ticket attraction would be a boat ride along the lines of what was originally proposed for Tiger River Run, but without the thrill aspect, merely a rafting experiance down the amazon, and hosted by everyone's favorite wilderness explorer, Russell from Disney-Pixar's UP. (With help from Dug and Carl of course). If they wanted a thrill aspect, you could bring in Kevin (the bird) and throw in a chase from Charles Muntz and his dogs. But for the most part the focus of the ride would be floating down a river through the jungle, and showcasing all sorts of different animals.
Another opportunity here would be to bring in the Indiana Jones franchise (perhaps not the Disneyland ride as it is so similar to Dinosaur) but some sort of Indiana Jones themed ride taking place in south america. Or maybe Mystic Ryhthms, or other concepts from Lost River Delta at Disneysea.
It would also be a great chance to expand the park's dining, with a the potential for food from south of the border.
Because there is limited space between CMM and Africa and the backstage areas to the West, this would be the South American Animal Exhibit area, a path connecting South America to Africa, but themed and featuring South American Animals (Similar to Pangani and Maharajah).
As part of this expansion, Festival of the Lion king would have to be moved up to Africa, and would be located behind Tusker House essentially, with access from the new Path leading to South America.
Mickey, Minnie, and the rest of the character greeting trails would be remodeled and moved to replace the cretacious trail in Dinoland USA...
...Because a new ride would be built replacing Primeval whirl a cartoonish edutainment style dark ride built by Chester and Hester showing off the history of Dinosaurs, what happened to them, and ultimately how they and their time period still effects life today.
Having these new additions would also open the door to expand operating hours, and eventually even add a night show. Rivers of light is a possibility, but at this point I would really like to see World of Color presuming that it's a hit at DCA (Which at this point, I am). The main viewing area would be located outside theater in the wild, a huge new tiered standing room area would be added, with infrastructure placed in the river. It wouldn't have to be exactly the same show (Althought let's face it, if it ever does make it to this coast it probably will be), but perhaps extra emphasis on the various nature segments.
At some point we all know that Disneynature will have to produce a new film to be shown in the tree of life theatre, perhaps even something 4-D with a live (or animatronic) host, and various in-theatre effects to emphasize the beauty and pure awesomeness of Planet Earth.
Tough to be a bug wouldn't have to go anywhere, but maybe become part of the Pixar Place Expansion, or even be relocated to replace the Pocahontas theatre in South America.
Just some Ideas.