This is why the Music and Movie industries need to die -- no risk takers too many assholes looking for a "sure thing" and will rehash the "sure things" right into the fucking ground till they have nothing left.
I suppose the alternative is better, where Netflix and Google front-run your concept and actor preferences within a millimeter of their mathematical certainty, and then regurgitate that back at you, until they run it into the ground etc. etc.
I don't know, most feature films are original or original adaptations, you just don't hear about them because they get narrow releases or debut on VOD. Go to Apple trailers sometime and count the number of original films versus the number of sequels, you'll find the former easily outnumber the latter.
Don't pin the crimes "studios" or Disney executives (and they're by far the worst offenders) on the "industry."
From the summary Tron:Legacy grossed $400 million from $170 million - that's a success even by Hollywood "hide the profits to avoid royalty payments" maths.
Profits are not used to compute royalties. Royalties are not dividends.