The Lion King was a surprising hit for Disney. It's generated millions of dollars. It's a favorite movie for millions of kids and adults (myself included!), and the theming would fit perfectly in DAK. So why reach out of already owned property to something that is little more than eye candy?
I've asked this before, but it just needs to be brought up again. Has anyone actually seen Avatar? Do you remember the plot line? How on earth are they going to put a happy, positive "Disney" spin on that?
With all the animal characters and animal based movies Disney already owns, why Avatar? And if Avatar, ok... but why DAK?