God forbid I should stick up for a bunch of cryptobros, but this Dune thing isn’t what it sounds like. That book isn’t a copy of the novel; it’s a collection of storyboards and pre-production artwork that Alejandro Jodorowsky assembled to pitch his Dune film. The buyers want to make the book widely available, and are aware that they’ll have to acquire the rights to do that. That will be difficult, certainly, but not impossible. This Buzzfeed article explains the situation a bit better:
I’m not sure what they mean about producing an animated series; I’m guessing they’re imagining an animated realization of Jodorowsky’s storyboards. I’m highly skeptical that that will work out. But getting that book published—that’s plausible.