So you might be waiting a long time.
> he could release his "work output" and own the copyright on that
Probably not in the united States, but other countries (i know UK at the very least) this would be true. The united states requires "creative decisions" to grant copyright. Work output by itself doesn't count.
You could still distribute it, you just couldn't copyright it.
While all those decisions may feel creative to you, its highly questionable whether they are "creative" according to the law (in usa anyways)
For the dreaded special editions of Star Wars, only Jabba's stupid face or the specific shot of the Death Star exploding with that ugly-looking ring would have a copyright of 1997. The original scenes cleaned and restored would still have a copyright of 1977.