What was the incentive to run it from art of animation? I don’t know the answers maybe someone does.
I would guess some of the same, think of all the expense to save on bus drivers, upkeep on the buses. They cant keep bus drivers as it is now. From what I heard before the pandemic disneys future plans was to expand skylines to most of the resorts so they don’t need buses. A skyliner from animal kingdom resort to animal kingdom would make sense. their was an article when they built the skyliner about how it would only take a few years to recoup the cost of it and how the upkeep was greatly cheaper than the buses. I don’t know if the skyliner has been as smooth an operation as disney was hoping but if they feel it works good enough they will use it for saving money in the future. It’s all about the money.
I also wonder if Disney has considered making more waterways to resorts and utilizing boats for more transportation. I enjoy the boats and would like them for more transportation options but then that’s more expense for operators and upkeep so doubt that would ever happen.