because they ve used outside properties before so its non starter for meI don't really understand why people keep bringing up Cars to defend Avatar. The key difference between the two franchises is that Cars is a Disney-owned and created property. Disney and Pixar have been together pretty much since the beginning and Pixar films are ostensibly seen as Disney films, the two companies will always be linked and Pixar has always been a presence in Disney theme parks.
Therein lies one of the issues people, including myself, have with Avatar. There is a wealth of material in Disney and Pixar already without having to go outside the company to buy the rights to other properties. Doing so smacks of a leadership at Disney that has no, or at least very little, faith in their product or creative employees and who lack any kind of creative foresight themselves.
anyways these arguments are old