I remember when Disneyland had a skyway. It was wonderful as a kid being able to look down at all the people below. I know the reason for it being removed. I know that WDW also had one. I believe that with modern engineering, it could be modified to accomdate wheelchairs.
The Animal Kingdom needs a skyway so that guests can experience the animals high above. I believe that this would give the guests a different view and experience of the animals. Also it would not disturb the animals. It could connect the two most remote parts of the park, from say Everest to the Safari tour. The buckets could be themed so that it would fit the park. It would provide another interesting way to move people around there.
I know that they will be opposition to this idea, but I believe that this is a relatively inexpensive attraction that would pay off in loads of fun.