Alan Moore and Dave Gibbons signed a shitty publishing contract for a creator-owned book, and given the general states of those sorts of contracts at the time, they thought they’d have the rights back a year after issue 12 hit the stands. It was instead successful beyond the wildest dreams of anyone involved.
(Incidentally, and this seems to be glossed over a lot these days, DC pissed off Alan Moore & Dave Gibbons originally because they started selling merchandise related to Watchmen, even though that wasn’t in the contract (if I remember correctly), and because they declared it was “promotional” and therefore Moore & Gibbons weren’t entitled to any of those profits. Rift created.)
Now there are spin-off books being released, and one of the original creators who feels taken advantage of by DC (and I happen to agree with that by the way, he’s been basically defiled by DC) doesn’t want anything to do with them. He feels that they’re being published by a company that does not ethically treat the people who work for it, and every inch he’s given them in the past has been taken for a mile.
A creator feels utterly mistreated by a corporation; the corporation is now making spin-offs of his original work and he is not okay with that.
You’re either okay with that or you’re not.