Paul, all your points are quite well taken. But in the interest of stirring up trouble (or as "we" say in academia, "critically interrogating architectures of power"), I might make a couple points:
(1) NBC's egregious error isn't in editing God out of VeggieTales -- it's in failing to tell Phil Vischer about their intentions, which are absolutely material to the contract at issue. In a twist that Jed is sure to love, had this controversy arisen in France, NBC might have been prohibited from violating the moral right of Vischer, the artist. The idea is that Picassos cannot be bought up, hacked into pieces, and sold a la carte. Not bad...except it's out of sync with the whole of Anglo-American jurisprudence. But is there a duty to be contractually clear about what the buying of rights really means -- particularly when it intersects with what could be conceived of as the "whole point" of the work?