Windexed said:

I still kind of wish GL was involved in some minor capacity (perhaps extremely minor). Kind of like how Arnold Palmer makes golf courses. He might tell them to put a tree here and a bunker there, but otherwise he just shows up for the opening ceremony, smiles, cuts the ribbon, takes a piss in the bushes, and leaves. The architects, engineers, and other skilled people do 99% of everything, which is how it should be.

Well since we don't know any details regarding screenplay... they might have used his story treatment (or at least partially), which would make it quite a major involvement.