Here's the whole ruling:
https://pmcdeadline2.files.wordpress.com/2015/01/wb-gravity-...
It's more complicated (of course) than Gerritsen makes it out to be. The Hollywood Reporter does a decent job of explaining the contours:
http://www.hollywoodreporter.com/thr-esq/warner-bros-knocks-...
(and, in fairness, it's more complicated than WB makes it out to be as well).
Most of the ruling concerns itself with the admissibility of various documents for the purposes of a dismissal ruling, which is complicated by the fact that the court has to stipulate all of the plaintiffs facts as true and still find no cause for a lawsuit in order to grant the motion.
From what I can tell, the meat of the ruling is:
* Gerritsen didn't have a contract with WB, but with Katja and, presumably, New Line.
* Gerritsen's argument depends in part on the notion that Katja/New Line would, absent control by WB, have fought against WB making a picture based on work they'd already licensed. Katja/New Line didn't do that.
* Gerritsen might have a legitimate grievance, but it's with Katja/New Line and its previous owners, who were paid by WB. Gerritsen is thus in effect a creditor of Katja's, and if she's owed something, it's owed from the proceeds of the sale, not from WB's own bank account. Or something like that?
It's headachey stuff.